The book finally came out last Tuesday and I got my email with my excerpt on Saturday, which you can listen to here.
I thought they were going to edit in music and sound-effects, but I guess that was too much to hope for. On the plus side, they cut out the sentences I stumbled on and re-did, but the booth wasn't entirely soundproof, which was also a little disappointing.
My verdict on the results is that it isn't great, but I think I did okay for someone who hasn't been behind a microphone in years.