Look at the most successful web sites on the Internet. They have one thing in common, user-driven content. YouTube, Facebook, MySpace, Twitter....the content is provided by the users. What are the user-driven elements on your web site?
Here is an article from Target Marketing that lists six points in building user-driven content. While the article addresses web sites for companies that sell products the points can be adapted for Sports Radio. To find the article just click here.