Putting aside Interstate Outlaws for now, if you guys have Battlefield 1942, shall we have a go at Battlefield: Interstate 82?
http://www.is82.com I used to play this with some local BF1942 players, and it's fun as hell. The deathrace tracks are boatloads of fun, though very difficult. The vehicles are just insanely fun to drive.
If you guys want to talk about a graphical overhaul of Interstate that is actually in a finished state, I'd say the Interstate 82 mod (not that sorry sequel) comes the closest to it. Granted there are limitations, such as it being strictly team based, but then ignore that and you have a winner.