Now it appears that WinFS has been given a reprieve, and could make an appearance alongside Windows Vista. WinFS preview code, possibly a first beta release, is expected to be issued to developers at Microsoft's PDC 2005. The company has also scheduled four WinFS-related sessions for the PDC.

Sources are reporting to Microsoft Watch that WinFS is also on track with efforts to back-port the technology to Windows XP. Vista's other fundamentals, Avalon and Indigo, were ported to XP to ensure developers had enough time to test the new APIs prior to launch.


Betanews link - Link


Comments
on Aug 29, 2005
I think a beta version was planned to ship since they pulled it.
on Aug 30, 2005
Microsoft on Monday surprised MSDN subscribers with an unexpected download: WinFS Beta 1. The company also clarified its plans for the future relational file system technology, which has been the subject of much confusion since the feature was crossed off the list of additions to Windows Vista.


Link