We had the BETA 1 announcement, now we have some additional bits that are bubbling up. Documentation is not included in the installation, as many of you should have realised by now. The online version is available at http://msdn.microsoft.com/en-us/library/fda2bad5(VS.100).aspx.
Additionally go here for the Beta 1 .NET Framework Developer Center: http://msdn.microsoft.com/vstudio/dd582936.aspx
Excellent documentation for those who would like to evaluate the BETA 1 release.