Blizzard has finally launched their 3rd Podcast which goes into the development of StarCraft II as well as some details about a couple other games. The podcast itself is roughly 1 hour long and at the beginning we are introduced to Dustin Browder who is the Lead Designer of StarCraft II. There is also an interview that talks about the development of the Zerg, and then the rest is about World of WarCraft. At the end of the podcast, there is a small Q&A session with the Blizzard devs.

Lots of insightful notes to take from this podcast in my opinion, and I loved to Zerg discussions (even though I am a Protoss player), but I won't give anything away and you guys should all go check it out here ^^.

Here's also a few other links that would probably help out.

Podcast #1
Podcast #2

Official Site