Pandora Radio

One of the radio stations I listen most to on the web is Pandora.com. It gives me the opportunity to create my own radio stations (I think it's up to a total of 30). You can add and drop artists, you can give the thumb up and they will play the artist more often a.s.o. What I like about it is that it also plays artists within the same music genre as the artist I chose to add to the radio station. This gives me a chance to find out about new artists that I wasn't familiar with, which I always appreciate.