This is something I've been playing with all morning. It's basically customizable internet radio. You enter in your favorite song (or bands, or multiple) to create a custom radio station. The service chooses songs that are similar and you can give them a yay or nay. As you give the service more information the music becomes very taylored, almost to the point of being erie.
This is definitely a killer app.
www.pandora.com
This is definitely a killer app.
www.pandora.com