This release includes a lot of new functionality and a number of bug fixes. There has been a lot of work on the Entity Engine, Service Engine, Workflow Engine, WebApp Framework, and new features for marketing in addition to a number of catalog, order, party and ecommerce enhancements.
For more details, see the release notes ( http://www.ofbiz.org/releasenotes.html ).
It's been a while since we did a release, so even though we are pretty close to doing a 2.0.0 release and starting a new versioning scheme (using 2.0.1, 2.4.3, and so forth), we wanted to do one last beta since there have been so many changes since 2.0 beta 2.
For those who have been stuck building from CVS, or who haven't been evaluating new functionality because of the delay in releases, here you go!