VHDL is added in the v1.4 and v2.2 (AXI-Streaming) release.
See
(Xilinx Answer 33276) for other Virtex-6 FPGA Integrated Block Wrapper v1.3 for PCI Express known issues and release notes.
Revision History 02/14/2011 - Updated wording to be clearer that v1.3 will not have VHDL.
09/16/2009 - Updated for ISE Design Suite 11.3 and wrapper v1.3
08/04/2009 - Changed expected release to 11.4.
07/08/2009 - Fixed spellcheck correction mistake. VHDL => HUDDLE
06/24/2009 - Initial Release