We're working on feature tests at the UMA interop site, kindly hosted by the OSIS folks. Head over to http://tinyurl.com/umaiop to see and contribute to the progress, and to register your solution.ve updated the main UMA architectural diagram, replacing the original UMA-specific terminology with OAuth names. In the process, the diagram also went from being a circle to being a "marvelous spiral". You can find several varieties of the diagram on the Attachments page. Thanks once again to our Graphics Editor, Domenico Catalano, for his excellent work.