Your new online identity has some unfortunate limitations, at least for now.
If you picked up a Wii U on launch weekend, you should know that your Nintendo Network ID can only be used with the console on which it was created. This means that unlike other systems with online offerings, you won't be able retrieve your unique Nintendo identity on a friend's console or a replacement unit if your Wii U meets an untimely end.
Nintendo revealed this interesting tidbit on its support website. "A Nintendo Network Account can only be used on the console where it was created. In the future, you will be able to use your Nintendo Network Account with future Nintendo consoles and other devices, such as PC's," the company promises.
Each Wii U console can support up to a dozen unique Nintendo Network IDs, so you should have no problem making an account for each member of your family, but they are currently tied to your console, and your console alone. This means that things like your Miiverse account will only work if you're at home.
The company hasn't provided any window for when the ID swapping functionality will be implemented, but for now let's just be glad that we're not still dealing with Friend Codes. The horror!