http://www.thefleamarkets.com/directory/index.php
Working on a facebook addon at the moment.
Added weather that gets zip from listings
Added facebook like and share buttons to listings
Added open Graph
Added 6 addons
Added facebook comment box on each listings that gets put on listings and shared through facebook
Added a google Map with pins
Added login with Facebook and login with Google friend connect (not tied into database, just for social interactions.)