I don't watch a lot of TV, but I do listen to about 10 to 15 hours of podcasts a week, while walking around, doing chores, working out or dozing off. I use the Downcast app on my iPhone now that Apple has crippled podcast functionality in iTunes and released a buggy app. Here are the latest ones holding my interest, in alphabetical order; it's heavy on Mac stuff and comedy. Downcast has a good search, auto downloads in background and a simple playlist function that can serve you up the latest episodes one after another.
Generally speaking, the best talk podcasts produced these days come from several networks: Leo Laporte's Twit, Dan Benjamin's 5by5, Jesse Thorn's Maximum Fun and Mike Monteiro's Mule Radio. Public radio outlets also offer most of their shows as podcasts (This American Life, Planet Money), and I listen to some of them but have not listed any here. Many also offer video versions, but I generally stick to audio, both to conserve storage on my phone and to avoid sitting around so much. Schedules, links and other details listed here were current as of February 2013.
Back to Work: Merlin Mann ostensibly discusses productivity and working life with Dan Benjamin, but often they just riff about comics, music and tech. Nearly every Tuesday. About 1.5 hours.
Boars, Gore and Swords: A humorous discussion of the HBO series "Game of Thrones" and the books on which they are based. Weekly, Sun. or Mon.; 1.5 hours+.
Buddhist Geeks: Discussions of and interviews about modern Buddhism with a technological bent. Weekly; day varies. 20 to 35 minutes.
Bullseye: Jesse Thorn's followup to "Sound of Young America," the public radio pop culture program. Usually Mondays. About an hour.
Generational: Living with technology, with interviews by Gabe Weatherhead. Usually Saturdays. Up to 2 hours.
Ihnatko Almanac: Andy Ihnatko, the tech writer and mutton-chopped ubernerd for The Chicago Sun-Times, talking about films, movies, comics and whatever else catches his attention, with Dan Benjamin. Thursdays. About an hour.
iPad Today: Leo Laporte and Sarah Lane with the latest news about iPads and iOS apps. Thursdays. About an hour.
Jordan, Jesse, GO!: Extremely vulgar comedy discussions from Jesse Thorn and Jordan Morris, with regular guests from the worlds of standup comedy and podcasting. Mondays or Tuesday. About an hour to an hour and 45 minutes.
Let's Make Mistakes: Design and tech discussions from @mike_ftw and company. Mondays. About 45 minutes.
MacBreak Weekly: Leo Laporte, Andy Ihnatko and assorted guests talk about Macs, Apple and iOS. Tuesdays, about 2 hours.
My Brother, My Brother and Me: The three McElroy brothers are humorous advice experts. Mondays. About an hour.
Quit!: Dan Benjamin wants you to quit your corporate stooge job. Takes live calls. Fridays. About 1.5 to 2 hours.
Risk!: Dramatic and humorous real-life stories by comedians, celebrities and ordinary people, often told before a live audience, hosted by Kevin Allison. Variable schedule. About 30 minutes to an hour.
Roderick on the Line: John Roderick, of the Long Winters band, and -- yet again -- Merlin Mann talk about arcane history, music and life in general. Erratic schedule. About an hour.
Savage Lovecast: The sex columnist Dan Savage gives advice to people from all types of orientations. Ear-opening. Tuesdays. About 45 minutes to an hour.
This Week in Tech: Laporte and assorted guests talk about general technology news. Released late Sunday, early Monday. About 2 hours.
The Thrilling Adventure Hour: Comedy in the style of old time radio broadcasts. Thursdays. Vary from 30 minutes to an hour.
Uhh Yeah Dude: Seth Romatelli and Jonathan Larroquette with a weekly audio news of the weird roundup. Thursdays. About an hour.
You Look Nice Today: Surreal conversations with Merlin Mann, Scott Simpson, and Adam Lisagor. Erratic schedule. About 30 minutes.