It was a long, entertaining talk and Whedonopolis.com has Jim’s permission to post it here in its entirety. There was a bit of audio processing involved (it’s a 47 minute long talk), but here it is for your enjoyment.
Listen to the Jim Butcher panel here. (Right-click and select "Save As" to save it locally.). Please note, this file is 46 MB and is 47 minutes in length. Also, be sure to visit Jim Butcher’s official website for more info on this book series.