Robo Rally computer games:
http://botsnscouts.sourceforge.net/
Robo Rally clone- playable Online!
It's got bots too, and they play decently. Runs in Java, works best in reses over 800x600.
It's got all the basic Robo Rally features, minus the option cards.
http://www.eyeplaygames.com/
Haven't played this one, but from what I read it's like PBW for roborally.
For those who haven't played Robo Rally- give these a shot. This game simply rocks, though it's probably better in person. Lemme know if you download the first game- I really want to play against someone again.
Phoenix-D