After getting some feedback on the matter, it seems the next audio book will be An Improbable Journey. I just finished my first recording of it, and i think it went reasonably well. I'll need some beta-listener feedback on it before I can release it of course. It'll probably be a while before I can just release them unheard. I need to improve before that happens.
Reading it aloud was an interesting experience, and is something that from now on will have to become part of my editing practice. I've made a few small edits to the story as a result of experiencing it differently. These are on the order of missing punctuation and so on, very simple corrections, nothing that impacts the story in a big way. There were several of them though, and it was enough that I'll be updating the eBooks available here and on Amazon, Smashwords and Goodreads sometime in the next day or two to reflect the edits.
In further podcast news, I'm getting close to solving the problem that's preventing the audiobooks from showing up in iTunes. I hope to have that fixed in the next day or two as well. Fingers crossed!