Robert,
The only answer I can give you is ‘whatever is up to beta quality’ when we draw the line in the sand for the beta drop. We’re looking at getting beta 2 out in a week from now.
One more thing of note is that the development team has now switched over to using Eclipse 3.0 as the primary dev environment on HEAD, so all 3.x builds will now be delivered before any 2.x builds. This changeover was due to the thunderous download volumes of 3.8 Beta 1, which sent its download volume screaming past 2.8 Beta-1’s volume in less than a week, even though 2.8 had a two week head start. We definately see that our user base is moving to 3.0 rapidly, so we are also.