I just ran the update to Ubuntu 11.10 Oneiric Ocelot on an Dell Precision 360 workstation. I found much to my pleasant surprise that the closed source Nvidia driver now seems to be working properly. With the previous version of Ubuntu (11.04) the Jockey-GTK program was not recognizing the availability of the closed source Nvidia drivers. But now they are installed and working well.
Ubuntu 11.10 includes a 2D version of the Unity desktop, and I have been test driving it on my desktop system. The Compiz version is a little slower, so I have been sticking to the 2D version for now. Since this is still a beta release, I get an occasionally program crash. Since there are still many updates coming down the pike, this is to be expected. Overall, I have been please with this latest version of Ubuntu!