Shoutcast is so passè, Pandora is a flash based music service that works like so: You enter a song or artist which Pandora plays then it finds a song or artist that is similar and plays that, you can rate the song thumbs up or thumbs down and Pandora builds a list on what it thinks you might like I am betting the more you rate the better it can predict what you'll like. Any who this is a great way to find new music. You can try Pandora for twenty minutes then it asks you to register for free. There is an ad-based free service which is awesome or you can pay about thirty-six bucks for one year of banner free music, one downside is you cannot request a specific song because of licensing. Either way its still pretty cool.
You may navigate to Pandora by clicking this text.