Does V-Ray 2.0 support the MR object color shader?
No, V-Ray does not support any mental ray shader. However you can use the VRayMultiSubTex texture, if this is what you need.
Best regards,
Vlado
It could be that I’m going blind, but I don’t see a page for the VRayMultiSubTex on the Spot3d help web site
That’s because there isn’t one 
It will be corrected, of course, but in the meantime, is there anything in particular that you want to know about it?
Best regards,
Vlado
Ah thanks for the reply, glad it wasn’t just me! No don’t worry, I’ll just play with it and find out what it does. Sounds like it could be useful.