UPDATE:
I just unlocked Chun Li and Ryu costumes.
Also, once you beat the final golfer (Brian) in Match Play, you unlock the ability to play as your Miis. Actually, they stick your Mii head on one of the golfers' bodies. It looks hilarious :)
My End of 2008 Hardware Predictions (console only):
Wii : 50 million
360: 28 million
PS3: 24 million
These predictions were made on January 3rd and won't be revised