EA have confirmed Nintendo Network ID's via an update to their privacy policy.

If you sign up to play EA games through a Nintendo Wii U console, your Nintendo account information will be provided to EA so that we can establish an Origin Account for you. You need an Origin Account to play EA’s titles online. By signing up to play EA’s titles, you agree that limited user account information can be transferred to EA. Information transferred to EA includes your Mii information, email address, Nintendo Network ID, friend list, country, language and date of birth but does not include credit card number or other financial account information.

http://www.ea.com/privacy-policy

Should be very easy to register with a range of services on Wii U.

Cool! I really hope Nintendo will incorporate some sort of achievement system along with the NNIDs.

PS: NNID is a pretty badass acronym.

I want to register the first XxSm0k3Dawg420xX ID.

It'd be handy if my Club Nintendo ID just carried over. It'd suck if they didn't let me use my Club Nintendo ID because it's my Club Nintendo ID already.

@Colourful_Hippie said:

I want to register the first XxSm0k3Dawg420xX ID.

Imagine how many XXxSlim_ShadyxXX variations there would be if this were 2000.

Don't worry guys Nintendo will ruin this somehow.

@sonicrift said:

It'd be handy if my Club Nintendo ID just carried over. It'd suck if they didn't let me use my Club Nintendo ID because it's my Club Nintendo ID already.

I suspect you'll be able to link your existing accounting using the same e-mail.

And it would be nice if you had direct and easy access to it.