Leo Laporte, one of my favorite geeks, is now on AM 640 WGST every Saturday and Sunday. His show is syndicated so it may not always be live due to WGST hosting the Braves. This call-in show covers a variety of topics such as computers, photography, cell phones, home theater, etc... If you want to become a little more geeky, give a listen to Leo. His show airs from 3pm to 6pm this Saturday. WGST does not have the schedule posted for Sunday.
He has multiple sites on the web, but a good place to start is here. Leo has also built a internet tv station which is here. I think he is now running