You can listen to or download podcast #23 (that includes the interview with Aaron) at their website at the below link
Or ...... I have edited it to just Aaron's interview (22 minutes).
Right click on the link below to save it to your computer.
Aaron Douglas - Galactica Quorum (Episode 23) July 14, 2007
WARNING: There are BSG Season 3 Finale spoilers in the interview. Other than that, no spoilers.