Facebook Graph - exchanging sessions for access_tokens
With help from another post, http://developer.appcelerator.com/question/21031/from-facebook-connect-to-open-graph I was able to connect to the Facebook graph and get access_token and able to run a test query to pull my profile information.
This code extends the Titanium.Facebook object with a new method 'sessionForAccessToken'
https://gist.github.com/98d02d89eb6c134ea3c1
Thanks for Brice for the ideas on how to make the exchange.