Super Monkey Ball - This game is short, and gets difficult in the later stages. Unless you are a SMB fanatic or want to try out the gyroscope controls, wait until this goes on sale. The game looks great tho.
Lego Star Wars III: I never watched the cartoon but I love Lego games. The graphics and 3D on this are impressive. From looking around it turns out this is either an upgraded port of the DS game or a toned down Wii port. I always avoided the Lego games on handheld because they seemed so simplified but this is definitely an exception.
Pilot Wings: I am no damn good at this game. Like everyone has said, the 3D is pretty neat, but it's pretty one note with only one "stage", and it should not be $40.
Samurai Warriors: I haven't played a SW or DW game before so I didn't really know what to expect. I'm only about an hour into this one but it is a cool game if you like hack and slash. It's also, as someone else wrote, the only niche game out so far.
Street Fighter: Not a big fan of fighting games and I'm

ing terrible at this. But, it was the "killer app" so I got it. Is there a guide for doing combos? With not much fighting game experience, I'm kind of lost.
Ghost Recon: Haven't opened this one yet.
Games I don't really want:
The Sims 3
Steel Diver
PES
Madden
Asphalt (Heard Ridge Racer is way better)
Bust-a-Move (can't you just play this on the internet for free?)
Combat of Giants: Dinosaurs (Uhh no)
Games I want to check out:
Ridge Racer
Rayman (Don't think I ever played Rayman 2 so why not?)
Nintendogs (Not a $40 game to me, I'll hold out for a sale. Plus, how can they make me choose between a Pug and a Yorkie?! Impossible!)