First OStatus Spec
Distributed Status Updates and Microblogging
The OStatus mission is to provide a specification and usage of several web standards to allow people to communicate across different social networks. The related protocols OStatus applies, are PubSubHubbub, ActivityStreams, Salmon, Portable Contacts, and Webfinger. The OStatus team claim that “practically any software that generates RSS or Atom feeds could be OStatus-enabled.”
Please see the OStatus distributed status updates and microblogging project's website, for more information.