This game is also on my list. Actually I'm waiting for it to show up. I've been playing the demo with my Gamecube controller as well, but it keeps crashing every few races. When I use any other controller, this doesn't happen.

I've recently read that there are a lot of people out there having problems with the Skillz Gamecube Adapter that I am using. In fact I have experienced some of them. Of the 4 Gamecube controllers I have, only one works perfectly. One has glitches on one of the shoulder triggers (the axis) and the C-Stick. With another, the car is constantly turning left slightly. And the 4th controller just doesn't work at all.

Are you using the same adapter? And if so, have you had any problems or gone through any trouble shooting steps to get yours working well?