We launched an open source web app that creates a social network around every bus stop in our region. It got us lots of press but is offered free to the region, and to any other municipality with transit info in GTFS format. We loved working on it and love seeing people posting comments. Details at http://denimandsteel.com/work/this-is-our-stop and repo at https://github.com/denimandsteel/thisisourstop