Found out just now that GT Racing: Motor Academy HD is on sale for $.99
!! It's normally $6.99. Just bought and installed it now, and it's fantastic. It's like a clone of GranTurismo, if you guys like that game. You start off with the same D, C, B, A license tests before you can race. The tests are even the same, with braking, turning, overtake, and a full lap.
Over 100 cars and the graphics are decent enough. Can customize EVERYTHING.