Tech show podcasts I download and (usually) listen to each week:

Leo Laporte - The Tech Guy
MacBreak Weekly
this WEEK in TECH - MP3 Edition
Windows Weekly
Engadget
The Cell Phone Junkie
Ask A Ninja, uh, it can be techie at times

Mind you I don't own a TV (and haven't watched TV in almost a year) and have a slower speed Internet connection (max 85 KB/second download).