My most popular blog has been Visual Studio 2012 does not support BI.  In short, this means VS 2012 does not support SSAS, SSIS, or SSRS.  Well, not anymore!  Just released is Microsoft SQL Server Data Tools – Business Intelligence for Visual Studio 2012.  This will update SQL Server Data Tools (SSDT) so that it uses the VS 2012 shell when using a SSAS, SSIS, or SSRS project.  Yea!