I'd just enjoy some semi-regular discussions on various topics and critiques on new stories and how they go down.
For example, I really enjoyed the 'Tavar' angle in Princep's Fury.
It's also possible to do Disscussions about the Growing Cast of Dresdenverse Characters. How they're seen by readers, what we're thinking as a result, blah blah blah.
I don't know... it's really easy to do Podcast Discussions based on Television Episodes, but books SEEM to be more intimidating and harder to wrap one's head around.
Of course, I've honestly given up on any new podcasts, considering the time commitments of most of the players involved, etc. etc.
Oh well, fun while they lasted. It was nice to have a news wrap-up all in one place, but even that has gone by the wayside.