The news you have heard is correct - Vista has RTM-ed (Release(d) To Manufacturing - essentially meaning it has shipped)! I was sitting in a classroom at the Microsoft Campus in Redmond when the news came in. The entire group I was with just spontaneously applauded - it was a great (and historic) moment. :) Jim Allchin spilled the beans earlier today on his blog.
In case you haven't heard, we will coming across Canada to celebrate the launch of Windows Vista, Office 2007 and Exchange 2007. The best news is that we want you to come over and celebrate with us! Come and visit our launch site to sign up - spots are filling up fast so you shouldn't delay: http://msdn.microsoft.com/canada/anewday2007/ * Edit: RTM acronym corrected
RTM = "Release(d) To Manufacturing", not "Return To Manufacturer"!
The blog post has been corrected.