Ubuntu 9.10, aka "Karmic Koala", is officially released.
If you've not tried Linux before, it's a good time to consider it. Karmic Koala boots faster (and unlike Windows, doesn't log you in and then grind away unusably as it loads up a bunch of applications so that later, if you happen to use them, they look faster). It has a new, faster file system, ext4. (Tired of having to defragment your hard drive? You don't have to under Linux.) Also new is Ubuntu One, your own personal cloud.