Currently I'm participating on a racing league called F-Sum and I wanted to invite anyone interested in this board to join. The league is based on the game rfactor (found here ) and what's different about it is we created our own cars. They are high downforce open wheelers with 550 hp similar to GP2 in terms of performance. The league creators have a propietary update method which allow us to change anything in the car/league weekly, we have our own chassis manufacturers (we are the manufacturers) and engine suppliers.
What is more fun about the league is that aids are allowed (although there is a small weight penalty for them), so beginners or people with hardware difficulties can join and have fun racing. The environment of the league is of a competitive collaboration so, although you will have great competition (some guys in here are real racers!), you will never find yourself without a decent setup or without anybody answering a question on how to take the line in a particular track. We not only hold league races but also special events, last one where some one laps sprints at the nordschleife (old nurburgring) in GT cars from the sixties.
For more info read this: http://negativesum.net/games/racingleague
Questions here nsrl-help@negativesum.net
Applications here: http://negativesum.net/games/racingleague/application