According to Wikipedia, 'Joggling' is the sport of running while juggling balls. Look it up, the guy who's 'joggling' looks like he's in tremendous pain. As was I when I turned my attention to O2's Joggler (neat segue - Ed).

The Joggler is basically a giant iPhone that you can't take anywhere. It's meant to sit in your kitchen, and O2 says to think of it 'as your new fridge door.' But it still refused to keep our milk cold.

What O2 is getting at is the Joggler is meant to be a kind of family planning device (no, not that sort). You can send and receive text messages on it. It has a calendar so you can see when your li'l cherub's next piano lesson is and you can use it to access the internet.

When I say the internet, I actually mean the Sky News RSS feed. It's meant to be safe for kids, you see.

Sitting somewhere betwixt a digital photo frame and a woeful netbook, I can see but a couple of situations where the Joggler would come in handy.

If you've got eight sprogs and need to see exactly what they're doing, and when, it might come in handy. It's also useful if you're stalking up to eight women, and need to send them anonymous texts, while keeping a diary of where and when you last saw them alive.

If this was You-and-Your-Eight-Children.com, we might be more tempted to give this a glowing review. Anyone with a vague interest in organising their lives, however, should invest the cash in a low-powered Linux netbook or cheapo all-in-one machine and stick that in the kitchen instead. Fridge door my arse.

Rugged PDAs almost invariably offer more protection than even the most rugged laptop or UMPC. The PS535F is no exception, with an impressive 1.52m drop test figure.

The IP54 waterproofing is disappointing, however: while it allows for a serious dousing, it's nothing in comparison to the IP67 offered by many rugged PDAs. Ergonomically, we liked the PS535F – Getac reckons it's the world's smallest rugged PDA.

A small package doesn't mean a low specification, though. The PS535D has all you'd expect of a PDA (Windows Mobile 6.1, 533MHz Samsung 2450 processor, 128MB RAM, 1GB flash memory, SD slot, 3.5in VGA screen, Wi-Fi and Bluetooth) and a whole lot more.

Specifically, it has a 3 megapixel camera, an electronic compass and altimeter and a built-in GPS receiver for full navigational capability.

It costs more than a run-of-the-mill PDA, but given its high level of ruggedisation and decent specification level, it's really not a bad buy at all.

It has taken O2 quite a long time to add HTC's latest Advantage device to its range, but it has finally appeared in the form of the Xda Flint.

The Flint is an unusual size and shape. It comes in two separate pieces with a keyboard that fixes to the screen using magnets. Due to its ungainly size, you'll need very big pockets, and it comes with a carry case that rivals a netbook for size.

The advantage of this size is a 5-inch screen with a sharp VGA 640 x 480-pixel resolution that makes Windows Mobile usable for basic office work. The keyboard isn't large enough for two-handed touch-typing, but we found it fine for fast hunt-and-peck work.

Haptic feedback

The keys are flat, but deliver a haptic feedback – vibrating each time you press a button so you know your actions have registered – which really helps with the typing speed.

This is a 3G device with HSDPA for rapid and smooth web browsing and reasonable download speeds. A front camera is also provided for two-way video calling. Wi-Fi lets you connect to wireless networks when in range, and Bluetooth and GPS are integrated too.

As this is such a large-screened device, it would work well in a vehicle for point-to-point navigation, but it's far too cumbersome to be used with any ease on foot. It also works well as a Pocket PC but, again, it's simply too large to hold to your ear to make private calls. Video calls are great though, as the onscreen image is suitably large.

There is 16GB of flash memory included and an old-fashioned miniSD card slot for adding more. Overall we like the Xda Flint but, in terms of usability, it falls uncomfortably between a netbook and a smartphone without offering the specific usability of either.

HTC's Advantage X7510 is both too large to drop into your pocket and too small to drop into your bag and be a laptop. So what is it?

The Windows Mobile 6.1 operating system gives it the potential to make voice and data calls and it features HSDPA, so data speeds should be fine. Voice calls are a bit of a challenge though.

There's no speaker for private calling, should you want to hold the chunky main section to your ear. You need to use headphones.

Sluggish keyboard

The mini keyboard means the Advantage X7510 could be used for word processing or serious emailing.

The keyboard is flat and if you turn the haptic feedback off, typing can be slow. The keyboard and main body are separate from each other and connect via magnets.

The system works well, as long as you don't prod the top-heavy body too hard, otherwise it'll collapse.

Large display

16GB of built-in Flash storage is welcome and a miniSD card slot lets you add more.

There is GPS and Wi-Fi here too. The large screen also means browsing is more rewarding than on many smartphones, and reading emails less hard on the eye.

In the end, however, there is too much compromise with the HTC Advantage X7510, being neither small or practical.

MWg's Atom Life (£200 inc. VAT) is a mid-range Pocket PC, offering excellent connectivity and plenty of features. But with no hardware keypad, the Atom takes the approach of a traditional PDA.

The front of the device is filled mostly by the 2.7-inch touchscreen display, along with a set of navigational buttons below it. Text is entered either using handwriting recognition or an onscreen keypad.

We found both input methods good enough to create documents or emails, but fiddly when we simply wanted to send a quick text message.

Pleasant styling

It's easier to make phone calls, where a large onscreen numeric keypad allows you to dial numbers without having to use the stylus. With a large speaker at the top, we found call quality to be loud and clear.

The Atom Life features a pleasing design - it's not the smallest of handhelds, and weighs in at 145g, but the curvy styling and silver highlights help to make it appear smaller than it is.

You'll find plenty of features crammed beneath the plastic casing, with connectivity to the fore. Fast download speeds are provided by 3G/HSDPA, and you'll also be able to take advantage of wireless networks using the integrated Wi-Fi adapter.

Wireless file transfers are made possible by the inclusion of Bluetooth and infrared. Files can be backed up to mini-SD cards, and the card reader is easily accessible, so you'll be able to swap cards without having to turn the device off.

Windows Mobile software

There's little here to differentiate the Atom Life from other Windows Mobile 6.1 devices, which will suit most business users just fine.

Word, Excel and Powerpoint Mobile are all provided as standard, along with Outlook Mobile, making it easy to sync your contacts, calendar and emails when you return to the office. You'll also find a PDF viewer in place.

VGA Camera

The Atom offers a VGA camera on the front for video calls, and there's a 2-megapixel camera on the rear. It takes vibrant photos, although images can suffer from slight distortion, with details losing crispness when viewed at full size.

With the camera situated on the corner of the device, it's also too easy to obscure the lens with your finger when taking photographs. A host of onscreen icons appear after you've taken the shot, making it easy to save, delete or even transfer it wirelessly to other phones or laptops.

With no major problems apparent, the Atom is a useful business tool, packing in plenty of features. The lack of hardware keypad means it won't suit everybody, but it is worth a look if you're seeking a traditional PDA.

The Toshiba Portégé G910 (£399 inc. VAT) is the successor to the G900 - a Pocket PC offering lots of features for the business user. While its predecessor offered a sliding keypad, the G910 features a clamshell design and leather-look plastics, and looks more like a miniature laptop than a phone.

Part of this is due to a lack of buttons on the front of the device, along with a small, three-line monochrome display. The buttons on the front are limited to scrolling through your contacts list and making or receiving calls.

Superior keypad

Open the top - as you would a laptop - and you'll find a 3-inch touchscreen display. Although not the largest of screens, its pin-sharp VGA resolution helps to recreate flawless images. As such, we also found it an impressive media player, with movie clips proving easy on the eye.

The keypad is one of the best we've seen on a handheld device, offering big keys ideal for all hand sizes. It's too small to touch-type on, but placing it on the desk allows you to type using several fingers. The keys give a reassuring 'click', making it obvious that actions have registered. The pad also features ambient backlighting, with characters illuminated blue in darker conditions.

The G910 is packed with features, and connectivity is excellent. You'll find a Wi-Fi adapter built-in, and Bluetooth makes it easy to transfer files wirelessly. Download speeds are improved by the inclusion of 3G/HSDPA, and Push email support lets the phone send and receive emails without delay.

We found call quality to be good and, although the G910 is larger than most phones, we found it comfortable to hold.

Windows Mobile 6.0

GPS (Global Positioning System) is integrated, letting you use the Toshiba as a satellite navigation device if you install your own software. We tried it with Google Maps and the high-resolution screen helped to provide clear and easy-to-read mapping.

The Windows Mobile 6 operating system brings with it a full Office Mobile suite. It's easy to protect your files, thanks to an integrated fingerprint scanner. For those wanting to move files between devices, or simply access extra storage, a micro-SD reader is in place.

There's a 2-megapixel camera on the rear of the G910, which offers both auto-focus and an LED light for night-time use. With the small screen on the front only capable of displaying text, the phone has to be open to use the camera.

Camera aside, the G910 does very little wrong. The lack of features on the front will put users off, but the excellent VGA screen, specification and impressive keyboard make this a serious proposition.

In this age of connected devices, there is something almost archaic about the traditional PDA, which has been driven to extinction by the smartphone.

However, HP continues to support it for its business customers and the HP iPaq 214 Enterprise (£225 inc. VAT) is the latest iteration.

You can tell it's for business users, typically the IT manager or platform developer, as there is support for two types of memory card.

You'll find the standard Secure Digital slot for adding more memory, which you'll need to do if you want to use the media functions, as the base unit only comes with 128MB of RAM and 256MB of ROM. There is also a CompactFlash slot, which is used for adding plug-in cards, such as a barcode scanner or even fingerprint reader.

Four-inch screen

The design of PDAs hasn't changed much in recent years, with four function buttons and navigation buttons positioned below the screen. On the sides there is a button for recording voice messages and also a mini-jack socket for headphones.

The device sports a 4-inch screen, which adds to the overall bulk of the unit. Weighing 190g, you're not likely to drop this in your shirt pocket and carry it round with you. The screen has a resolution of 640 x 480 pixels, which is rather impressive and we liked how sharp images looked.

There is an ambient light sensor which can alter the screen according to the lighting conditions of your location. This can help save battery life. The screen is a little soft and you'll need to press quite hard for the stylus to register when using the handwriting-recognition software.

Windows Mobile 6

Functionality is great, with wireless LAN connecting quickly and smoothly. Once connected, the larger screen is a bonus as it allows you to access websites a little more freely than a PDA with its smaller display, especially if the website doesn't support resizing for PDAs. Bluetooth is also built-in for connecting to your phone.

When it comes to processing power, there is the Marvell 624MHz PXA310 Processor, which proved a little sluggish to open applications, but it's sufficiently powerful enough to handle Pocket Office tasks, as well as run Windows Media Player.

HP is still using a larger charge connection. Once again, this harks back to the core user, as this connection is compatible with previous generations so business buyers won't complain about the change to a new design.

HP has done a fantastic job of updating the iPaq 214 Enterprise and of modifying Mobile Windows 6 to help the iPaq run as smoothly as possible. While the screen adds to the device's overall bulk, it's a good size to use out in the field.

The best doodles you ever draw are the ones while you're on the phone or in the middle of a meeting.

Inevitably you had to quickly screw up that bit of paper, but with the Genius G-Note series you can instantly store all your doodles, and boring stuff like minutes of meetings, digitally through this A4 notepad.

Steep price

The problem, though, is that at £80 it's massively more expensive than translating your notes from pad to PC. Despite the multiple functionality, it's difficult trying to get past the price.

It can double as a tablet when attached to your PC and comes bundled with handwriting recognition software that can translate your notes fairly accurately.

Should you spend a lot of time in meetings, taking copious notes, then this could be a worthy buy.

The G-Note does what it does in an impressively capable fashion, but the high price is what's stopping us from being able to truly recommend it.

Following the launch of the UMPC (Ultra Mobile PC) last year, we've seen a variety of portable products that attempt to offer better usability in a portable package.

T-Mobile's Ameo (£80 inc. VAT) sits between the UMPC and Pocket PC, combining 3G connectivity, a 5-inch touchscreen display and a removable QWERTY keyboard.

It comes bound in a leather case and looks like a small diary when closed. It can be used with or without the keyboard and navigation can be done with a joystick or via the display.

The screen is one of the best we've seen on a device this small, offering bright, vibrant and sharp images. There's plenty of space onscreen for viewing webpages, documents or even movies. A VGA adapter also lets you plug in an external monitor.

The keyboard holds the Ameo at an angle so you can see the screen when typing. Strong magnets keep it in place, and when not in use it can be clipped across the display, offering protection.

Surprisingly fast typing speeds can be achieved once you get used to the keyboard. The keys are well spaced, but still slightly too small for touch-typing. They also lack travel, so it's difficult to know if you've pressed hard enough.

Perhaps the most impressive thing about this product is the range of features included - from a SiRF Star III GPS chip to Bluetooth. It also has a 3-megapixel camera on the rear, and a VGA camera on the front for video calls.

Bulky dimensions

Although you can use it to call people, it's too large to use as a mobile phone, weighing in at 375g, but with a microphone and loudspeakers in place, it's easy to talk with the device sat on your desk.

A wireless adapter is also built in, so you'll be able to connect to networks and take advantage of cheap VoIP (Voice over Internet Protocol) calls.

The Ameo runs Windows Mobile 5.0 instead of the resource-intensive Windows Vista or XP and can be updated to Mobile 6.0 if necessary. With a 624MHz Intel Xscale processor in place, performance is far more usable than you'll find on its UMPC rivals. There's little lag, and you can be working within seconds of turning it on.

There's also plenty of storage space on offer, with an 8GB hard drive in place. If you need more space, a SDHC (Secure Digital High Capacity) compatible card reader is fitted.

The Ameo's keyboard would benefit vastly from a longer travel to the keys, and we'd like to see Windows Mobile 6.0 installed. However, it's a step in the right direction, and we could imagine using it for long stints.

Of course, business people with this addiction have long been able to get a fix of email on the go. The original Blackberry was conceived as a portable email machine with a miniature keyboard. However, it was nothing like a mobile phone - apart from the fact that it connected to a mobile network to send and receive data, of course.

But now Blackberry has realised that it can combine the compelling immediacy of its older products together inside a conventional mobile phone shell. The first result of this - at least for the UK market - is the 7100. This particular model is the 7100v and, in the obviously likely event you were wondering what the 'v' means, it stands for Vodafone. The 't' model will also be available by the time you read this and, rather unsurprisingly, that will be connected to T-Mobile.

Blackberry is undoubtedly the new cool; Palm, Symbian and Nokia have all said they will support Blackberry tech in future. Defying our early impression, the 7100v is an impressive smartphone - it looks and handles like a conventional mobile.

We had early reservations simply because we're great fans of the established smartphones such as the recently reviewed Sony-Ericsson P910i and the Microsoft Windows Mobile powered Orange SPV C500.

These players have learnt an awful lot since they first launched into the smartphone market and, while the 7100v is controlled by a easy-to-get-used-to selection button and jog wheel on the side of the device, it's true to say that we didn't get on with it quite as well as we did with Sony Ericsson's Symbian system or Windows Smartphone 2003. As you'd expect, the OS on the 7100v has also been skinned to look smart in Vodafone Live!-style livery.

One aspect of the phone that's not quite as intuitive is the keyboard. Yep, you're looking at it right, instead of a conventional phone keypad, the 7100v has a QWERTY keyboard by putting two-letters on a key.

Blackberry has obviously been beavering away on a new buzzword for this; SureType, which basically means that the company has thought at great length about where the keys should go. And, of course what to do if you need a ! or a £. Essentially only you know if you'd get on with it. But, it has to be said that it's typical of the innovation that Blackberry brings to a phone.

Feature-wise, the 7100v is a treat. Bluetooth is included, though Wi-Fi is lacking. The email function is brilliant. Business types can use fancy Exchange servers, but you can also set up a conventional email account. Simply choose an email address and it's associated with your handset in a minute or two via its IMEI number. No configuration is necessary and you can send and receive emails immediately. And, since it's permanently connected to your mail, you'll receive your mail in your pocket as soon as it's sent to you.

The handset price is dependent on tariff, in conventional mobile style, and includes a certain amount of email bandwidth.