Have you discovered this, yet? Nerdist Writers Panel is hosted by Chris Hartwick and offers up podcasts with professional writers. Translation = they know more than us.
The most recent addition to the page is Podcast #36 recorded on March 25, 2012 with Bill Lawrence (creator, Scrubs and Cougar Town), Ken Levine (Mash, Cheers, Wings, Fraser, The Simpsons), and Richard Hatem (Grimm, Secret Circle).
You can also get tickets to attend live podcasts. July 20th is in Houston and July 21st in Dallas. Either one looks good to me!