Beyond that, the Developer Page for the CTA is here: http://www.transitchicago.com/developers/. Go nuts.

 
Margaret Heller 
Digital Services Librarian 
Loyola University Chicago
773.508.2686 
>>> Jonathan Rochkind <[log in to unmask]> 2/8/2013 10:30 AM >>>
Coincidentally, I happened to notice this today. In case some code4libber in chicago for the conference feels like playing with it, someone has just released a ruby gem with ruby wrapper for CTA API (who even knew there was one?), apparently allowing realtime tracking of busses, among other things.

https://github.com/fbonetti/cta-api