The purpose of the UMA Work Group (charter) is to develop specs that let an individual control the authorization of data sharing and service access made between online services on the individual's behalf, and to facilitate interoperable implementations of the specs. Read the spec, join the group, get involved!
Follow us on Twitter – our handle is @UMAWG and we often use the hashtag #UMAWG. (You can mention http://tinyurl.com/umawg to take people back here.) Find us on Facebook too.