BlizzCon from our sister site, Big Download: The DVD Production panel. The DVD Production team, despite the name, actually oversees most of the video produced by or at Blizzard. That means that they had a hand in the South Park episode "Make Love Not Warcraft," as well as the "What's your Game" and "Lawgiver" commercials.
They also work on the gameplay trailers from World of Warcraft, and walked us through the creative process for the patch 2.1 Black Temple trailer, revealing some interesting lore behind Akama's betrayal. Finally, they revealed that they were the force behind the Wrath Gate cinematic. It's no wonder they were able to make such an epic cut scene though: One of their team members was a member of Rufus Cubed Productions, the creations of the epic machinima Return.
There's some other nice information from the panel, including the real identity of the villain from "Make Love Not Warcraft" and a preview of the lore of Diablo 3. Be sure to go check it out at Big Download!