Don't listen to these people. They're all haters. There are plenty of fun games on the Wii. No it's not as good as a 360 but I have both and I haven't even considered selling my Wii because I think it's fun.
Some fun Wii games are:
The Legend of Zelda: Twilight Princess
Red Steel
Mad World
The Conduit
Animal Crossing: City Folk
Skate It
Medal of Honor: Heroes 2
Call of Duty 3 (CoD 4 came out on Wii this year. Don't know if it's any good).
Mario Galaxy
Super Smash Bros. Brawl
Also, you probably already knew this but, the Wii plays Gamecube games and there are hundreds of awesome Gamecube games. And on the Wii marketplace, there are hundreds of N64 games, NES games, SNES games, Genesis games, and more.
Wiis are not a bad game console, they just aren't as good XD