For 3D in MOS?
At the moment it's PPC Rave3D with a Warp3D wrapper. (You can run both Rave3D and Warp3D games.) Umm... If I remember correctly, there will be an OpenGL (or was that TinyGL) library in the near? future and Rave3D support will itself become a "wrapper".
Although, for the MOS users that are running on Radeons, they won't have 3D support before 1.5. (Not sure how near that is.
) I switched over to a Voodoo3 (AGP) in the mean time myself.
