[gatein-dev] Retrieving user data from within a gadget

Is there any standard way to retrieve the user information from within a gadget? I have looked into oauth, and it appears to be some oauth code in GateIn, but it doesn't appear like its setup properly to allow me to access information about the currently logged in user. I can use the cataline SingleSignOn authenticator and use the same realm in my gadget war to get the remote username. Is there not a better way to do this?