Reason number 4952 (ok, we lost count) we're excited for the iPhone 2.0 software update: Crash Bandicoot Nitro Kart 3D. Yes, it's pretty much just a MarioKart Klone -- but it looks like a quality clone and, let's be brutally honest here, the chances that Nintendo is going to develop for the iPhone when they have a perfectly good and popular portable out there is precisely nil.
Looks like you steer with the accelerometer, tap the screen to shoot your powerups, and use your voice to giggle with glee. Next step (we hope): networked multiplayer. Pretty Please?