2008 Nov 5, 3:51
This site has example implementations for feedsync: "The FeedSync Specification is available under the Creative Commons Attribution-Share Alike License and the Microsoft Open Specification Promise.
Microsoft encourages developers to create independent implementations of the FeedSync specification. See the Developer page for more information on how to write a FeedSync enabled application, and
the Implementations page to see how people are using FeedSync already."