The show is currently recorded every other week, split into two parts and fed weekly. You get part "A" the first week and part "B" the second week. It is not a "professional" podcast with specific show topics and scripts. It's three friends sitting around "geeking" with microphones recording them.
Brad, Glenn, and Christina host Podculture and spend their time rambling about what they watch on TV, what's in their DVD player, their new "toys" and video games, comic books, and a couple of special segments called "Geek Cuisine" and "Glenn's Guilty Pleasures". Geek Cuisine has the hosts trying out a different snack and beverage each episode on-mic and discussing whether or not they like them and why. Glenn's Guilty Pleasures features Glenn talking about really bad old movies that he likes and thinks other geeks might like. Podculture also is friendly with other podcasts, and runs promos for those podcasts, and even has been "syndicating" sci-fi reviews from the excellent Firefly podcast, The Signal. The hosts also mention a little bit about their "real lives" during the show, as asides to whatever the current topic of conversation may be.
It's that little bit about their real lives that makes Podculture extra special. Through their rambling, you seem to get to know these three people more and more as you listen to each episode. Listening to Podculture makes it seem like you are right there, sitting on the couch in Brad's living room talking about the geeky stuff you've done over the past week - except you're the introvert of the bunch and you let everyone else talk while you listen.