UnrealSpeed Mod Goes Racing

Thanks to GameSpy for pointing to the new 1.5 Beta of UnrealSpeed, which describes itself as "..a racing mod for Unreal Tournament 2003. Drive a car, gliding through the twists and turns to win the race. Your car is (optionally) heavily armed, so shoot your opponent into pieces if he isn't letting you get past him." This mod, using similar re-appropriation concepts to the classic Quake Rally mod, has added "..new camera views like driver eye cam, bumper cam, roof cam and rear view camera", as well as swapping out all the car models due to copyright concerns. How many other game genres can people make from clever modding of an FPS?