Pandora rules. I have had a lot of cool email conversations with the founder, Tim Westergen. Those guys are passionate about music. Like us!
I find http://www.live365.com fairly useful for music radio too.
Here is my modern fusion radio station I created.
http://www.pandora.com/?sc=sh30789031409900567
I love Pandora cause they open your eyes to so many artist you never heard of.