KB 867572 (Supported operating systems in Virtual Server 2005 R2) was updated yesterday from v7.0 to 7.1

For VMware or XEN users, KB 897615, Support policy for Microsoft software running in non-Microsoft hardware virtualization software appears to have been updated to version 3.0 on Nov 10 *.

And lastly, speaking of support James O’Neill has posted some answers to all the questions’s we’ve wanted to ask =)

There will not be a no new releases of Virtual Server; (no new server side 32-bit Virtualization).  But Virtual Server will be supported to the end of 2014. It became available in 2004, so mainstream support lasts until the end of 2009, and extended support ends in 2014, when the product is 10 years old.

There is a general expectation that there will be a new version of the desktop Virtual PC, at the moment there isn’t any concrete information to share. 

As well as server 2008, we also have service packs in the pipeline for both Windows XP and Vista in the works.  There may be [updates] for Virtual PC and Virtual Server to fully support the new OSes, but for general guidance, all three will be supported as guest OSes under both Virtual Server 2005 R2 , Virtual PC (32 bit only).