Google Developers Group
transitchatter is social activity app for those commutes you do on Chicago trains and buses. While the current api is adobe air, the next release will be a full native android application and have an expanded feature set to match the iphone application in itunes appsore.
The application was conceived by Samuel Pro and his friend due to their sharing train and bus commutes within Chicago. Some of the features are:
chat with other commuters
find out about events, deals, etc
news and entertainment
tracking and alerts
Give a try today, free for your use.