Amazing. Beryl is a new fork of Compiz, which extends some possibilities. http://www.youtube.com/watch?v=i0ZtcxHUSDQ As for Compiz/XGL (older videos) http://www.youtube.com/watch?v=DUSn-jBA3CE (dual-head) http://youtube.com/watch?v=lawkc3jH3ws (single-head)