I've been looking into this. Super Tux Kart has just switch to using irrlicht for its 3D engine. At the moment irrlicht only supports the full OpenGL spec. There is an OpenGLES 1.x port in development but it hasn't made the release version yet and anyway, the N900 uses OpenGLES 2.0 which is not backwards compatible.

There are some projects to implement OpenGL on top of OpenGLES but they are very alpha at the moment. So in the short term, the answer is no.