[thejaxx]

These are the ones I listen to regularly:

Gaming:
Achievement Junkie
GFW 1Up
http://gaxonline.com/ aka Mog Army RSS Feed
Virgin Worlds

Geek/Tech
Diggnation Video
TWiT
Wwdn - Wil Wheaton
Geek Acres
Geek Brief Video

Humor:
The Onion Radio
Distored View - If you are offended easily, DO NOT LISTEN!!!!

EXCELLENT Audio Book Author:
Scott Sigler