I don't know a podcast about comics but a friend of mine writes a blog and tweets, and she seems quite knowledgeable as far as a non comic person like me can tell...
https://www.blogger.com/profile/03545162612237984546

My hubby loves Mark Kermode's film reviews (he's a podcasty person, my hubster) http://www.bbc.co.uk/podcasts/series/kermode