I subscribe to the Battlestar Galactica (presented by the executive producer), Halo 2 Podtacular, and a variety of other podcasts.
As a matter of fact, I have pretty much managed to recover the much-lamented loss of Tech TV's Call For Help and The Screen Savers, both of which did not survive the transition to G4 TV. It's called, "This Week In Tech" or "TWiT". (You can also access it from Leo's website--follow the link from his name, below.)
From the description:
Join Leo Laporte, Patrick Norton, Kevin Rose, John C. Dvorak, and other tech luminaries in a roundtable discussion of the latest trends in high tech. Winner of People's Choice Podcast and Best Technology Podcast in the 2005 People's Choice Podcast Awards. Released every Sunday at midnight Pacific.
In addition Leo LaPorte's KFI 640 AM (L.A.) radio show is available, commercial free and Kevin Rose and Alan Albrecht have two sets of podcasts. I say, "sets", because they have audio-only versions and VIDEO versions of both Systm and Diggnation. Check out their homepage Revision 3 which some people say refers to Tech TV being Rev One and G4 being Rev Two.
I'm even subscribing to a Chinese class and a French class, both via podcasts!