I know some people in Scandanavia are using it 'coz I had to do some fixes for them to do with non-ascii characters (stupid languages! ) in e-mail. Other than that, it's like John Tuohy said: "When you don't hear anything about a new feature either it's because nobody is using it or it is just working!"

The OAuth bits should get you an access token you can probably use, but then you don't really need the rest of it (which frankly is now outdated since MS keep adding/changing stuff in their APIs - i.e. they switched to their new "Graph API" version a while back). Also it was written pre-JSON objects, which would make it all much simpler.