Ubuntu 6.10 named Edgy Eft was releasd yesterday. It contains many new exciting features including a new startup routine called upstarted instead of init. It comes with GNOME 2.16, Firefox 2.0 and a host of other software. To read about the features in GNOME 2.16 go here.
Both sever and desktop versions have been released. A point to note is that this edition does not offer long term support. This version will be supported only for 18 months.
I did not get a copy of the OS yet. So could not try it out. Its going to be a while before I could do that. I will write more on this once I get hold of a copy.