In its blog, Quentin Clark (here) is announcing a big change in the availabilty of WinFS technologies.
Some of them will be available in the next version of SQL Server, code-named “Katmai.”
Moreover, because the more mature WinFS technologies will be included into SQL Server “Katmai,” there will be no WinFS Beta 2. In its place, we will deliver CTPs of SQL Server “Katmai,” which will include these technologies.
Moving forward, we will continue to work on additional integrated storage technologies included in the original WinFS project. These technologies will continue development in “incubation” and have the potential to be delivered in several Microsoft products, including future versions of Windows, SQL Server and more.