Next SQL Server Stop: Katmai - Another PDC, another code name. Or Two. As in Katmai. That's the internal name for the successor to Yukon--the soon-to-ship SQL Server 2005. In a PDC interview with CRN, none other than Bill Gates said that the WinFS server implementation will come sometime in the "Katmai" wave. At that time the WinFS client and server technology will unify all the various data repositories, he said.
 

Gates: Vista Workflow, LINQ Extensions To Benefit Partners - Gates also said ... He acknowledged that the much anticipated WinFS client and server technology that will unify all the separate data repositories won't be available until the next major upgrade of SQL Server, code named "Katmai," due later this decade.