In this post I will show default session for Sabily 11.04 Badr Beta which is gnome2 and then I change to Unity session. For Ubuntu 11.04 Beta, their default session is Unity. Maybe due to some software and driver issue, Sabily make gnome2 their default session. You can change the session to Unity after log out. I think soon they will include gnome3 too.
Here some screenshot of Sabily 11.04 Badr