> if NVIDIA would be supported more macs could be used without
> modifications to MorphOS

Adding a driver for nVidia GPUs would qualify as a "modification to MorphOS" in my book ;-)

> it's not that difficult to source a mac with a Radeon in it, so is it worth it?

If MorphOS had nVidia (NV30+) support it could potentially also run on PPC Macs with non-exchangeable NV30+ GPU, i.e. some models of PowerBook G4, iMac G4 and iMac G5.

> I guess they better put the effort in the faster Radeons that have 2d support already.

Gallium3D could also bring (3D) support for Radeon R300+ GPU. PPC Macs with non-exchangeable R300+ GPU include some models of PowerBook G4, iBook G4, eMac and iMac G5. Refer to: http://www.x.org/wiki/GalliumStatus