WinFS is probably one of the most exciting offerings in the Microsoft pipeline. The next step in information storage on the Windows platform, WinFS is an active storage platform based on a data model that is an organizational framework of WinFS Types. Some of the out-of-the-box types in WinFS are Document, Contact, Picture, VideoRecord, and so forth. You also can extend the built-in type system by creating your own types, which makes the type model extensible. And, because it enables you to represent your data as objects, you can have synchronization and rules capabilities built right into the framework that supports them.
This article dives deep into WinFS, and tries and explain it's architecture.
Read the Article.