Some of these are a little old, keeping them here for archival purposes. Code for all of these examples can be found on GitHub.
Building an Airport Flight Data API
Building Mobile Data Collection Apps with Fulcrum & Accela
Visualizing Homicides in Philadelphia
SMS Restaurant Inspection Lookup
Introducing SEPTAlking: The Train is Listening
Fun with Node.js, Growl and SEPTA Twitter Feeds
Speech Enabling Open311
Phind It For Me
Civic Innovations 