The 6th episode of BlizzCast was posted today, and though it contains very little WoW-specific information, the podcast still contains a ton of information general Blizzard fans would like to hear. When listening to it, keep in mind that it wasn't recorded in the last few days or anything like that, it's a few weeks old at least. They mention Wrath of the Lich King still being in beta testing and Sylvanas' custom model hadn't yet been implemented, for example.
Their guests this time around are Lead Tools Programmer Monte Krol, Senior Art Director Samwise Didier, Lead Game Designer Dustin Browder, and senior artist for Diablo III Anthony Rivero. That lineup of guests really offers up a cool look at the early design and development of Blizzard games, and the guests actually offer a little insight into just how you can start working for Blizzard yourselves. They also have another installment of their Q&A portion with various developers.
Starcraft and Diablo fans will find the gameplay information in this BlizzCast more interesting than people who are exclusively WoW players. As always, BlizzCast is available for download through the official website (EU has it as well), iTunes, or you can read the transcript right on their website.