Have you had the chance to use Gnome 3.0 yet? If so, how does it compare to Unity? They look relatively similar, and seem to have the same overall goal in mind. I'd also imagine that since Unity is a shell running on top of Gnome 2.x, while Gnome 3.0 is its own environment, that Gnome 3.0 would perform better and be more efficient overall. Is this the case?