The SSDT January 2014 release has been updated to support both SQL Server 2012 Parallel Data Warehouse Appliance Update 1 (AU1) and continues to support SQL Server 2012 Parallel Data Warehouse.  This release of SSDT is now PDW version-aware, and the experience is different when connected to SQL Server 2012 Parallel Data Warehouse versus SQL Server 2012 Parallel Data Warehouse AU1.

SSDT version history:

VS 2012: January 2014 version: 11.1.31203.1, October 2013 version: 11.1.31009.1, August 2013 version: 11.1.30822.0, June 2013 version: 11.1.30618.1, December 2012 version: 11.1.21208.0, November 2012 version: 11.1.21101.1, September 2012 version: 11.1.20905.0, version shipped with VS 2012: 11.1.20627, initial version: 11.1.20225.0

VS 2013: CTP2 version: 11.1.31024.0

VS 2010: No longer being updated*, October 2013 version: 10.3.31009.1, August 2013 version: 10.3.30822.0, June 2013 version: 10.3.30618.1, December 2012 version: 10.3.21208.0, November 2012 version: 10.3.21101.1, September 2012 version: 10.3.20905.0, initial version: 10.3.20225.0

* From Microsoft: We will no longer update SSDT for Visual Studio 2010.  Projects and DACPACs are fully compatible across shells.  Please download the toolset for VS2012 or VS2013 using the links above for continued updates.

More info:

Updated SQL Server Data Tools January 2014