SQL Server Yukon Delayed to Late 2004 "Typically, Microsoft doesn't make public promises about release dates so that the company can later claim ignorance about delays. ("We only ship products when they're ready" is the usual PR spin.) But having a major-league Microsoft executive actually admit to a delay is unprecedented. Yukon is important for several reasons: The product is a major platform that will be accompanied by a new Visual Studio (VS) release, and its new data store will form the basis for the Longhorn WinFS file system extension, the Blackcomb AD, the Exchange Server Kodiak release, and various other storage-related products coming down the road. So this product truly is one that Microsoft should delay until the company gets it right. My guess is that Yukon will ship simultaneously with Longhorn--in 2006."
(Italics mine -- have to wonder if he meant Blackcomb instead of Longhorn)