Had a short IRC chat with my mentor, mentioned setting up a Launchpad project, and got a link to an article relating to OAuth, as this is an area I'm not yet confident in:
Then I have talked to verterok (thanks for invaluable pointers on u1-java-storageprotocol !! Now I know where to start playing around), collecting further links:
(python script to extract my OAuth token from gnome-keyring for testing purposes)
Then found those three, perhaps semi-related, since OAuth nature is browser-based:
http://code.google.com/p/oauth-signpost/ ( http://brainflush.wordpress.com/2009/05/03/introducing-signpost-easy-oauth-for-java-and-apache-httpcomponents-android-too/ )
We need to register such callback schema handling: x-oauth-androidu1://callback
And this one nails it!