One of Ubuntus new features is a button that has a Facebook icon on it. I see the point. But what I really don't get is how this is different to starting a browser that accesses facebook? I like icons, but still, a bit silly.
They have also got some search news. Pressing the upper left button "dash" enables you historically to search through your computer quickly. Now it also searches online. So that sound like an improvement for real. Cloud style!
They have also got some kind of preview function while doing the search, I might have to try it out, because I dont really see how it works, other than for videos and music.
Anyway for a more complete overview just go to http://www.ubuntu.com/ubuntu/whats-new