Slacker Radio
http://www.slacker.com/

Slacker has the most personalized content of any radio service. We combine the knowledge of the nation’s leading music experts from every genre and your own personal taste to create perfect radio stations. You can listen to custom music, news, sports, and comedy stations for free, while subscribers have on-demand access to specific songs, albums and playlists. With Slacker, you can personalize your content and listen everywhere. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.