I've had access to the early, early beta 1 bits of SharePoint 2010 (and of course, focused on WSS, or "SharePoint Foundation") since early this summer.
But, just like you (I know, kind of ironic), I've been waiting for the Beta 2 bits to become available for me to play with (and write books based on). For some reason, only TAP participants (Microsoft's Technical Adoption Program-- only available to large, large early adopting businesses), have gotten any of the more recent (ie, actually working) bits. This means that MVPs are in the same boat as the general public when it comes to getting to work with the most recent beta release of SharePoint 2010.
The beta 2 release is basically considered "feature complete." I have been given to believe that this means that all the features of the release version of SP2010 are there, however, it may not be as snappy, resource lean, or, well, functional, as the release version (c'mon, it's a beta).
If you would like to sign up to get a copy of the SharePoint 2010 beta 2 release, you can sign up here http://sharepoint2010.microsoft.com/try-it/Pages/Trial.aspx.
Good luck. : )
Tuesday, October 20, 2009