AFAIK, SP1 is still on track to be delivered simultaneously with Windows Server 2008. It's far enough away from Vista's RTM and close enough away to shipping that Microsoft should confirm its existence. In fact, beta testers should be given builds in the next month or so to start testing. And since it's shipping in the next 5 months or so, Microsoft should start giving guidance for all those companies (Intel, I'm looking at you) who are holding off until SP1 to deploy Vista.

http://www.windows-now.com/blogs/rob...p1-exists.aspx

as if a news article with title "Vista SP1 does not exist" makes any sense; of course SP1 exists, it has been announced since Feb 1, days after the Vista launch...