The final beta of Ubuntu 13.04 has been made available for download.
The second beta release of Ubuntu 12.10 has been made available for download. It arrives ahead of Ubuntu 12.10's final release in just over 2 weeks time.
The first beta release of Ubuntu 11.04 is available to download and test.
Well, for some of you readers, it's already the 2nd of September, and the Beta release of 10.10 is out today. Originally, this was scheduled to be Alpha 4, but the Maverick Release schedule was slightly altered a few weeks ago to give a bit more time to "Release Quality" (read:bug hunting and rough edges). Click through to read more and learn how to upgrade from Lucid if you're keen.