I have FIFA 08 on the Wii and i gotta say it's the first sport title that made me play it the whole night. The controls are good, the online ROCKS, and the Footii Party is AWESOME! Get it!

So far it's been really fun, after a short while you begin to enjoy the controls.
I haven't played online yet, or even single player, but 1 v 1, 2v2 or 4 v AI is great fun, even the Table Top Football mini game is done well and is very enjoyable.

Graphics ofcourse don't compare to what I'm used to on the PC, but it didn't affect my enjoyment of the game at all and the music this year is really good.

So far it has a BUY rating from me.
MY XBox owning cousin now wants to get a Wii :)

Fifa "Party Style" Recommendation
Game of 2v2
Game of 4vAI
Game of Table Top Football
Game of Wii Boxing to let out frustration at team mates!
<Pizza>

Classic Fifa 1v1 is still great on the Wii!