I seem to always come back to one of these:
Rant Radio:
http://www.rantradio.com
Chronix Aggression:
http://chroniXradio.com
Digital Gunfire:
http://www.digitalgunfire.com
And it might be obvoius, but I always check
www.shoutcast.com to see if anything catches my eye. Here's their list of Talk stations:
http://www.shoutcast.com/directory/i...ml?sgenre=Talk
And their list of comedy stations:
http://www.shoutcast.com/directory/i...?sgenre=Comedy