Jason pointed out that his station, KBCO in Boulder has halted internet streaming of its' broadcasts.  It appears that KBCO is a Clear Channel station  [linked here] and the article below may be explain why they stopped streaming:

http://www.wired.com/news/digiwood/0,1412,57134,00.html

Clear Channel: Radio's Big Bully:

http://www.salon.com/ent/clear_channel/

Also, if you don't want to listen to a Clear Channel station, here's a list of (some) possible alternatives, there may be some CC stations on this list too though:

http://dmoz.org/Arts/Radio/Internet/