This is probably one of the most well known web applications in the existence of existing. Pandora[.com] is a free (with a few ads) internet radio that quote “Plays only music you like”. First, put in your favorite song/artist (no registration required, but registration keeps track of all your stations for use on other devices). It will then find tracks like the artist or song you put in, and will make a “station”out of it called “[Artist/song here]”. Then, it will play a track with very close qualities to the artist/song you put in. You can them select thumbs down or thumbs up to modify the station. It will play constantly for about an hour and then say “Are you still listening?”. To avoid this, just click something over there. It only does that when it thinks you aren’t there and the app stays motionless for 1 hour. You can have LOTS of stations, I don’t know the maximum (if there is one). And with Fluid (clickable) you can turn it into a desktop application. What else could you ask for? No ads! To do this, you need to subscribe to pandora ($$). Ever hear music playing through my live feed? A lot of the time it’s pandora. Also, you can even create stations based on genre.