We are beginning to use using Christian's UMA-Specifications area on github as our working repository for specs. Stay tuned while we rationalize the various official and unofficial copies of UMA specs lying around. The Working Drafts page is your best source for overall status.
Make sure to keep up with the SMART JISC blog for SMART project news.
This radio broadcast (mp3) (in German) with guest Christian Scholz discusses privacy and UMA.
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.