On May 16, the WinFS team whetted the appetites of advocates of Microsoft’s next-generation file system by sharing information on plans for a new, Microsoft-developed application for WinFS, code-named “Project Orange.”

WinFS, Microsoft’s next-generation file system, is still churning its way through the beta process. But that isn’t stopping Microsoft from building a new information organizer that rides on top of WinFS storage and the Windows Presentation Framework.

Microsoft has also posted some job postings on this Project Orange. See below and find the post here

If so, Project Orange may be the right fit for you! Project Orange is a brand new team tasked with building a next-generation Information Explorer based on WinFS and WPF (AKA Avalon) to help users finally get organized. This is a soup-to-nuts project focused on defining a breakthrough user experience for users to unify, organize, and explore their data in meaningful new ways. WinFS and WPF offer dramatic new opportunities for information management by merging the traditional world of relational databases with end user data and offering new opportunities for interaction & visualization.

Microsoft Project Orange is WinFS Killer App ? source