On April 29th the new Release of Ubuntu, named Lucid Lynx, will be available to download from the official Ubuntu site. Currently the release candidate is already available, so if you want to try out, you can get it now and upgrade to the full version later.
One of the biggest changes is the new default style in Gnome, which puts the menu buttons to the upper left part of the window instead of the upper right. This is a little bit confusing, but you can change back to a more traditional layout.
Only problem so far was installing apc but I guess I will solve that one soon 🙂