Well, why not comics? With the ease with which we can put audio into people's hands via the internet, it's a very simple matter to record a commentary for a comic book. The people who want to listen to it are self-selecting; they presumably all have the comic already, so all that is needed is to sit in front of a microphone and chitchat for a while.
This is the commentary podcast for Top 10 Season 2 #1, written by Zander Cannon and drawn by Gene Ha. It clocks in at almost 52 minutes, so put aside some time, curl up with the issue, and enjoy!