WordPress 3.0 Beta 2  has been released and it seems WordPress 3.0 has miss the initial release date of 1st May 2010, which I think is good. They should not rush to meet the release date as it should be release when it is done. I am guessing they will head to RC1 in the next release.
Things to test:
- Revised menu user interface
- Changes to the WordPress exporter and importer to make it more flexible
Download: WordPress 3.0 Beta 1