I just came across this news on BBC.
BBC NEWS | Business | Microsoft delays launch of Vista: "Microsoft plans to delay the consumer launch of its much-anticipated Windows Vista operating system to January 2007. "
I am not sure if the all the Vista launch will be effected by this. Which I hope it shouldnt because Vista is supposed to made available for the corporate customers in November, 2006. The product I am working on these days is supposed to have a Vista UI so we are also eyeing November time frame.