A couple suggestions for the adventurous listener:
WFMU – a free-form station based in Jersey City, NJ. I’ve been an on-and-off listener since the late nineteen seventies.
RRR – or ‘Three Triple R’ out of Melbourne, Australia. Also a long-time source of good independent music.
Put your favorite suggestions into the comments!
Mediated 
Comments
Try KSDS, 88.3 FM in San Diego. Good Jazz most of the time.
Here’s the link:
http://www.jazz88online.org/index.php