My wife stumbled across this the other day and I picked up on it and have been morbidly intrigued ever since. It’s called Pandora and is an offshoot of the Music Genome Project. It’s a way to discover music you might not normally have been exposed to. You start with a band that you know and like and then expand your horizons from there based on the suggestions they give you of stuff that is musically similar. Enjoy your little musical voyage, I know I am.