Thought you might be interested in BatRacer:

http://batracer.com/-1FrontPage.htm?D7

BATracer is a browser webgame similar to some racing manager style webgames. However, it is unique in that gameplay centres around the player as the driver, rather than the team manager. This introduces multiplayer team work as an important part of success.

It's a great game, and includes BTCC, F1, A1GP, V8 Supercars and Champcar series, with more being added over time