This is a little complicated.

The very good Texastribune.org has an article about making government information accessible. And they say nice things about recent activities in New York City. If you read through the article and make a jump you will eventually come to parkShark, which is an iPhone app for parking spaces in New York City and Boston!.. Hooray. These things are baby steps that could have great efects. The MBTA let someone else create an app for buses but they left off the Number 1 bus. That’s my bus, naturally. If the MBTA had created the app itself it would probably list bus routes in Springfield, Ma.

http://www.texastribune.org/blogs/post/2009/dec/31/records-what-big-app-le-can-teach-us-about-open-data/