Thanks to all that have replied so far. FYI... adult ages are mid 30's. I am thinking that Mario and Sonic at the Olympics looks like fun. I have heard good things about Rayman Rabbits and Wariowear as well but not sure. Also, Supper Monkey Ball Banana Blitz?
Anyway, to be honest jsut got the Wii for the kids for Chirstmas (at least that what the wife thinks) and I am currently putting together a backyard theater. We have a big back yard 1/2 acre with a stone campfire ring where the kids cook hotdogs and stuff and I just bought a 8' x 12' blow-up movie screen and top notch projector. The Wii will be heading outside for a night run on the 8' x 12' screen. Oh yeah baby! Just need to figure out how to get the surround sound to work with the Wii and there will be some fun nights ahead. Did I mention the 8' x 12' screen!!!