We've been collecting Dr. Watson reports and user bug reports of issues encountered installing TFS Beta 2.  Unfortunately, the success rate is not as high as we would like.  Yesterday we released an update that will address 2 of the issues we've seen people run into.  We have another set of them coming in the next couple of weeks I hope.  I'll let you know when they are available.  The symtoms of the two issues these fixes address are the errors:

• "There is no team project named' in source control"
• "TF220059: The installation process cannot continue"

You can read the KB article here for more detail and info on downloading and applying the fixes.

 http://www.microsoft.com/downloads/details.aspx?FamilyId=C4015D2F-2383-4270-9AAD-97129590F31D&displaylang=en

Brian