Using FB 630_2004, the Visual Studio.NET dialog does not show me any UI to allow the location of VS2010 to be set - it has fields for the location of devenv.com in VS2002,2003,2005,2008 but not 2010. The Default VS Version combo correctly includes 2010.
I was able to manually set MSDevPath2010 in the .INI file and everything's working, but I guess there should have been some proper user-interface for this. Strangely I thought I already had this working on a previous install of Windows, so I don't know if there's something which makes this UI show/hide itself. I'm on a Win7 x64 machine.
It was an oversight on our part. FB should actually detect the installed location of VS2010 automatically, however if you had a beta or rc installed in a different place then that would not be the case. This build has the UI needed, we’ll update the release build on monday.