The developer preview of OS X 10.5 “Leopard” includes an integrated feed syndication platform with Bonjour integration according to a message board posting from a WWDC attendee. The software was distributed to all conference attendees and should be available on your favorite file-sharing network shortly.
A new framework is included for publishing and subscribing to RSS and Atom feeds, including complete RSS parsing and generation. Local feeds can be shared over Bonjour zero-configuration sharing and discovery.
The new framework would provide an easy interface for Mac developers to include feed syndication features inside their products and share user data across applications. Bonjour integration could create a grid network of feed subscribers, allowing a user to grab the latest BoingBoing entry or NPR podcast from their local network instead of initiating a new external network request.