I just hope that they include a real friends list system, and not the code crap that the DS uses. Nintendo doesn't seem to have a clue about online gaming yet. I hope they learn a lot before the Wii releases. Everyone seems to be taking a lesson from Microsoft on this one. Live rules even if you have to pay for it. Getting all those features for free from the big N would be awesome.
It's nice to have free online play, but I can't imagine that it would be any good. If it's free, its usually crap. I think the price for an x-box live subscription is reasonable, and x-box live is really good.