What was promised was business availability this year, broad general
availability next year. If you have a volume license agreement with MS,
or an MSDN subscription, or a Technet Plus subscription, or want to buy a
business license pack, then you can get Vista right now. That is what has
always been stated officially by Microsoft.
General availability through standard retail channels (stores, with new
PC, etc) is scheduled for January 30, 2007. Again, this is old news. See
this news release from October 13th -
http://www.microsoft.com/presspass/press/2006/Oct06/10-13VistaReleasePR.mspx.
And then this from November 8th which mentions the specific dates for
business availability (November 30, 2006) and worldwide general
availability (January 30, 2007) -
http://www.microsoft.com/presspass/features/2006/nov06/11-08VistaRTM.mspx.
So yes, Vista is available to a large sub-section of Microsoft's customer
base, but not yet general available to everyone.