That is a rare and wonderful thing. I did have one Generation Kill author tell me something that was sort of the converse; she said that she had refused podfic in the past, and although she had mostly changed her mind about it, she still doesn't give permission because she didn't want to be unfair to people she'd refused permission to in the past. I do think this is becoming less of a "thing" as podfic becomes more and more ubiquitous in most fandoms. In the few short years I've been reading it, it's gone from something where most people have to ask "What is it?" to something that most take for granted. And look at you, furthering the process/cause. :)