Coolest Internet Music Thing

Mrs. Captain showed me this site: Pandora is the coolest thing I've seen on the internet in a while. You prompt the program with artists or songs you like and it plays songs it thinks you might also like. You give thumbs up or down and it tailors a streaming music channel for you, and it beaks down what it thinks your musical tastes are. Very interesting...Except I don't understand the name; it should be called "alright".