I use the latest FB (6.3.0.1916) and VS2010 RC, the solution is a simple new 4.0 target WPF project.
I get the validation error ".Net Framework Settings: The selected version of the .Net Framework was not found" when "Use MSBuild" is checked and "VisualStudio .NET Options : Visual Studio installation not found : \devenv.com" when "Use MSBuild" is not checked.
I tried to update the v4.0 section of the DotNetConfig.xml to set Directory and CLRVersion to v4.0.30128 but no success. Help!!!
It works!!! Grreat job. One little problem remains - still cannot run MSTest. Gives a validation error “VisualStudio.Net Options : Path to Visual Studio.Net 2010 not set”. And there is no field in the dialog to set this option yet.