I don't see where everyone is getting this "Nintendo is watching you" crap.
There is like a bajilion
wii users out there, and the chances of them actually looking at you would be slim. Besides, I think its an evasion of privacy, expecially when using the internet channel.
Nintendo never said in their ToS or whatever that they would be spying on you, otherwise the people at the homebrew community would have said so. They only thing they talked about was the automatic updates.
I could be wrong though, I'll look over it again.