Ubuntu 9.10 "Karmic Koala" Alpha 2 is now available. This second testing release for the forthcoming
Ubuntu 9.10 doesn't bring too much in the way of exciting features or major changes since
the release of Alpha 1. There is, however,
GRUB2 as the default boot-loader.
There are also some updated X.Org bits, the Linux 2.6.30 kernel, the latest GNOME 2.27.x packages, and other updated packages pulled in from Debian. Unlike the first alpha release, a desktop LiveCD build of Ubuntu 9.10 Alpha 2 is also available. Updates to Kubuntu and Xubuntu are also available at this time.
The Ubuntu 9.10 Alpha 2 release announcement can be read on their
development announcement list.