Start with the comic book podcast wiki and

add:
Savage Fincast
The Mostly Mellow Pop Culture podcast
Panel Pals comics podcast
2d Festival podcast
Bombast podcast.
Why Not Indie The Reasons Why
Kara Zor-El podcast
Krypton's Last Daughter a Supergirl podcast
Eeper's Choice
The Sidekickcast House of Muldwych
Nug and Cymek Review - vid
Crazy Sexy Geeks
Mike's Amazing Podcast