Nintendo has opened up registration for its new account system, as well as letting users sign up for its new iOS and Android app Miitomo.
You can register for a Nintendo Account using your Nintendo Network ID, Twitter, Facebook or even Google+ account, and you'll want to be fast to ensure you get the username you want - or the closest approximation.
The Nintendo Account can be used for Nintendo's upcoming rewards program as well as Miitomo, the company's first smartphone/tablet app. Right now, though, you won't be able to do much with it.
Creating a Nintendo Account will also let you pre-register for Miitomo, which will arrive next Month. Although there's a lot we still don't know about it, Miitomo will be somewhere between a game and a social network, in which you'll interact with friends via your Mii avatar.