Lifehacker: "Ubuntu 10.10, due for release this Sunday, adds a lot of little things here and there to the Linux system, but also some entirely new, great stuff. Here are the most useful and impressive new features in "Maverick Meerkat."
The last Ubuntu release, 10.04 "Lucid Lynx," was a "Long Term Support" release. That means it will be supported as a more stable and steady version for further into the future than other releases, and also brings in more new features. This release, 10.10, is more about iterative improvements to the core apps, like the GNOME desktop, the default Firefox browser, and other odds and ends."