"Once legally unlocked, the iPhone will operate with any SIM card, including foreign ones," Louis-Michel Aymard told iLounge. However Aymard said that some features like Visual VoiceMail may not work as a expected. All of which of course means you still have time to nip over the channel and bag yourself before Christmas.
Contract-free iPhones are available in France for just €749 (£534), although you'll obviously still have to pay for monthly call and data charges on network here. That contrasts strongly with the £269 plus £35-£55 per month O2 charges for an iPhone on an 18-month contract.