http://www.extremetech.com/article2/0,1558,1967383,00.asp?kc=ETRSS02129TX1K0000532
This is a review of several music community sites that are supposed to help you find music that fits your taste.
I haven't checked them out in detail, but it seems like a very interesting idea. Even with a new fresh station in town it is nice to be able to branch out and see what is out there. Even a good station suffers from a limited selection of music.
One of my coworkers uses pandora.com (http://www.pandora.com)
I started using last.fm (http://www.last.fm) a while ago, mainly since support for it was included in amarok (http://amarok.kde.org/). Hopefully soon it'll support last.fm "streams" as well.