Scott Willhite just announced via twitter that the Beta version for DotNetNuke® version 5.01.00 is available for download. Basically, the DNN team is making the betas available publically, as the number of possible use cases has exceeded those that they are able to test right now. As a result, more than the acceptable number of bugs have been coming along with recent DNN releases.
Before I tell you the download link, know this: PLEASE report any and all bugs you find. It is up to people like you and I to help make DNN better. And what easier and cheaper way to help support the project? Report bugs to: http://support.dotnetnuke.com
Download DotNetNuke version 5.01 Beta