Pandora let's you discover music you didn't know you liked

if you like listening to music you have to check out http://www.pandora.com, is quite a cool concept, is a small Flash Application that loads on your browser and lets you create radio stations based on your input, i.e. you enter an artist or a song that you like and from there Pandora gives you other songs that are similar in tones, rithm, etc from artists that you may even never have heard of but that you might like, you can create multiple radio stations of different styles of music, if you really like some song, you can even buy it from a link that is provided for each song, there's even music in spanish =o)

very nice marketing concept, you have to check it out
http://www.pandora.com