Thanks Dimitris,
We mainly use VRay (and use the competition plugin for scattering, not to my liking), and the vrayproxy feature for our work is a must, as for 2011 painting feature i'm already using in production for 6 months since i'm on the beta, and i must say it really is worth the upgrade, the viewport canvas (in 2011) is another point that when doing "green work" is a must, since it help a lot in controlling various parameters of a scatter like plugin, and if FP is going to support this then is really great.
Best regards,
Daniel