Ok I signed up for spotify but I have to pick all teh songs I want ?
Pandora is much better. I just say coldplay and then it plays keane, death cab, etc.
http://www.spotifyfm.net/Theres a few out there like the above. Pretty sure theres a similar thing built into spotify now, but cant find the info on it. At the very least there is the Artist radio which is a mishmash of the artist you chose and similar things as well as collabs.