The idea behind some of our recent radio request campaigns on Twitter is simple: encourage, empower and enable fans to request new singles on Twitter in an attempt to drive air play!  Fans type in their city and are presented with a list of local stations that they can choose from and then send a tweet to.  You can see this campaign in action at http://www.tweematic.com/pushtacircles

Location-Driven
Users type in their location to get a list of local stations. The application can also auto-detect a fan's location.

Twitter-Sharing
Users are then able to share their request on Twitter!