Episode 39 of the SoCalWarhammer podcast includes an interview with Rick Priestly.
From their announcement:
In this episode we talk to Rick Priestley about Hail Caesar! and other wargames. This 45 minute uninterrupted segment brings light on many of thoughts on the game creation process. Rick enlightens us on some of his work while at Games Workshop and what he has been doing since he has left the company. John Stallard joins us for the last few minutes of the interview and give a hint about a new ancient historical army soon to be released by Warlord Games. As always we remain free and won’t be begging for any of your hard earned money. We include some new stuff and hope you enjoy!