Just installed VS 2008 Beta 2 and tried to add ReSharper 3.0.1 using this install command:
msiexec /i D:\ReSharperSetup.3.0.1.CSharp.msi VSVERSION=9.0
The installation runs complete and when I fire up VS I see that ReSharper is initializing. However I get no menu option for ReSharper inside the studio!
Just thought you wanted to know... ;~)