WingNuts from FreeVerse is a 3D, realistic moto-cross simulation. Using the acceleromoter, you race through the desert, woods etc, avoiding obstacles, and trying to reach the finish line before your time expires. The graphics are extraordinary, the game play is intuitive, and overall this is the type of app that you simply have to see to believe.
The price of $9.99 is high -- but this is a real arcade quality game. You will enjoy this one for a long time.