I believe CsGL is being ported to Mono. One of the developers is looking for testers (ridge at randyridge dot com). My card doesn't have 3D support so I haven't been able to assist with the testing. There's also glgen in Mono CVS, a binding which aims to be very similar to the original OpenGL API. Another one to try is MonoGLo, http://sourceforge.net/projects/monoglo