"The Ubuntu team is proud to present the beta release of Ubuntu 6.06 (Dapper Drake). With Ubuntu 6.06 Beta comes loads of bug fixes, a new look-and-feel, a new live-CD installer, GNOME 2.14.1, and much more." You can
download it as both live-CD and install CD, and as always, available for x86, x86-64, and PowerPC.