Right on schedule, Canonical has unleashed the latest release of its popular Linux distribution—Ubuntu 8.10, a.k.a. Intrepid Ibex. You can grab 32-bit and 64-bit installation images from the official download page, although the new images haven't propagated to all download mirrors just yet.
As we noted earlier this week, Ubuntu Linux 8.10 introduces the GNOME 2.2.4 desktop environment, 3G mobile connectivity, a "guest session" feature for sharing a system without compromising user data, and support for dumping the installer on a USB thumb drive (via an application in the operating system itself). You'll also find an updated Linux 2.6.27 kernel, X.Org 7.4, Samba 3.2, and more.
Check out the complete release notes for all the details. If you'd like to try Ubuntu without going through the hassle of partitioning your hard drive (or sacrificing a separate drive), you can use Wubi to install the OS straight from Windows. Ubuntu can then be removed from within Windows like any other application.