Those of you with Yahoo Messenger, be sure to upgrade to the latest version at:
http://messenger.yahoo.com/
It includes a great tool called LAUNCHCast, which consists of a number of free channels that stream music in the messenger. I highly recommend it for music fans!
Any channel with little headphones you can select. Just hit stop/start to pick another random song.
For about $3 a month, you can get higher quality streams and access to all the channels.. as well as vote for stuff you like to be added to your own custom "station".. the free/included channels are extensive plus the free quality isn't all that bad either!
I've been using it the past couple days and it's a fantastic way to preview/checkout new music in just about any genre for free.. not to mention help you come up with stuff for new sets! Try it out!
