Haha. Actually at the end of the Meteorpedia article, there's a note to Tim Haine's work to seperate OAuth stuff login logic, so they can be used seperately for this kind of stuff, but the dev needs to implement the integration his/herself. Also, from a quick look I couldn't find any documentation on it... if anyone knows anything, please point it out.
When I did the
Meteor Usermap quickie, I had need to get extra info from facebook, google & github. In this case, I also used it at login time, but the way it's implemented it could be used at any time. The implementation unfortunately was via npm modules for all of these, and not via the Meteor packages (as per the note above), but it works great. See the
accounts.js on github. A little bit hacky though.
I'd love to (when time allows) create a smart package for all the above, and some other things I've come across. Unfortunately no time at the moment :(