The .NET Framework SP1 Beta-compatible version of eSqlBlast is available at http://code.msdn.microsoft.com/esql/Release/ProjectReleases.aspx?ReleaseId=991. The release includes a source code zip as well.
The SP1 Beta distributions of .NET Framework 3.5 and Visual Studio 2008 are available through: http://msdn.microsoft.com/en-us/vstudio/cc533448.aspx