Ubuntu 8.04 "Hardy Heron" Alpha 5 is now available for download. This is the first Ubuntu alpha release since the 8.04 feature freeze, and now planning is also underway for
Ubuntu 8.10 Intrepid Ibex. The complete list of features (and download links) can be found on the
Ubuntu Wiki. Likewise, the release announcement can be read on
ubuntu-devel-announce. There is one more Ubuntu 8.04 LTS Alpha release planned before the beta/RC and then the final release in April.