It is supposed to authenticate me to Google Docs using my Google Docs account. However I just get a 'cannot log you in message'. I think this is because I connect through a proxy. I would assume I need to configure either the AIR engine or the application to tell it about my proxy. But I can't see where I do this. I've seen a post that says 'Adobe Air uses the system settings' (http://forums.adobe.com/thread/244550?tstart=-1) - but I'm not sure what system settings? My browsers are all configured to use the proxy.
It doesn't work on a computer which connects directly to the internet either. (Maybe it is using a depreciated authentication mechanism?)