I'm new to the Wii, and haven't played any online games yet (in fact, I don't own any yet). How do you go about finding people to play against online? Do they have to be people you've added as friends? (I *have* added friends from here thanks to the "post your wii code" thread) Or do you go to a server of some sort and find a list of people who are also looking for people to play against? Thanks!