Got a Wii for the kids. Nice thing about jumping into the Wii game this late in the game is that there are enough quality games to purchase. Don't have to worry as much about the shovelware crap that comes out week after week with the occasional good game in between. Mario Kart, Super Smash Brothers Brawl, Wii Sports, Wii Play, and Super Monkey Ball Banana Blitz should be enough to keep them entertained for a long while.
The Wii is accessory hell though.