http://www.theregister.co.uk/2006/06/26/winfs_axed/
There goes another "unique" feature...
WinFS Team's Quentin Clark wrote on Friday that Microsoft would not be releasing WinFS as a plug-in for Windows XP or Windows Vista.
"These changes do mean that we are not pursuing a separate delivery of WinFS, including the previously planned Beta 2 release," he wrote. "With most of our effort now working towards productizing mature aspects of the WinFS project into SQL and ADO.NET, we do not need to deliver a separate WinFS offering."
There goes another "unique" feature...