I have one partition with Ubuntu 12.10 made lean. It is the updated/upgraded Beta 2.
I played with Unity for sometime on that. Unity actually make me little tired.
Downloaded Ubuntu 12.10 and installed Gnome-shell 3.6.1 from Ubuntu repos and uninstalled Unity. This Gnome 3 is the base of Unity anyway, I only needed the Gnome-shell. It worked much better than Unity.