2010 Betas - SharePoint 2010 Beta, Office 2010 Beta, Fast Search 2010 Beta, Project Server 2010 Beta, Visual Studio 2010 Beta
During Microsoft PDC 2010, Microsoft has released - SharePoint 2010 Beta that includes SharePoint Foundation 2010, SharePoint Server 2010, SharePoint Designer 2010, Search Server 2010 and Fast Search Server 2010 Beta. They also released Office 2010 Beta, Project Server 2010 Beta. Did anyone tried already, how did you like it?
Recently Microsoft has also released Visual Studio 2010 Beta 2. I have tried it and it is a complete make over from Visual Studio 2008 (atleast the graphics, look & feel wise).
Following is a screenshot from MSDN for the complete list