I'm not sure why the countdown graphic isn't updated (UPDATE: it is now!), but Ubuntu 12.10 is available. I've upgraded to it, and so far, it's very nice. If you've always wondered about Linux, check it out. If you are a Windows user, you can try it out via Wubi without even having to repartition your hard drive, and if you don't like it, you can uninstall it via the Windows interface for deleting programs that you're familiar with.