Now there is another free to play Racing massively multiplayer online role playing game in MMO Heat Online. MMO HEAT Online is a F2P Racing game from Innologin Ltd currently in open beta. The open beta just started in fact on August 17, 2010. The game is the North American version of Level-R.
The open beta will last for one week and be limited to one thousand players. Players can join tournaments, enter into crew battles, or just race in versus or arcade mode against up to 7 online players. A Drift game mode lets you slide your car against sharp turns. There is also a capture the flag mode.
Check it out here