The current version of Super Tux Kart uses the irrlicht 3d graphics engine for all its rendering. Currently this supports DirectX, OpenGL and a custom software mode, but no OpenGLES 2.0. There is an pre-alpha OGLES2 driver in development for the iPhone which could form the basis of an N900 driver. I don't currently have the skills or free time to port though.

If we could get the irrlicht engine ported it would also make available a number of other games.