The latest news about ubuntu is that Unity has finally been made default in Ubuntu (desktop) 11.04 Natty Narwhal, as described in the Ubuntu meta changelog. This means if you download the latest Ubuntu 11.04 Natty Narwhal daily build and boot from it, you should get Unity as the default environment. The changelog also mentions that GNU Screen has been removed from the desktop version.
I couldn’t try out the natty build yet, but here is a video with the latest Unity in Ubuntu 11.04 Natthy Narwhal (as of today):
The start menu is not there (the Ubuntu logo in the top left corner just triggers the Unity launcher unhide). So in order to launch application we must use the terminal, the Unity is not really usable yet, it still has lot of bugs.
The Unity launcher (“dock”) can be set to autohide or float and the desktop switcher finally works.
There is still a lot of work to be done, but let’s not forget that Ubuntu 11.04 Natthy Narwhal alpha 1 is expected on December 2nd, as for now we still have to wait.