BioWare will be streaming a live video feed of Dragon Age 2 from PAX Prime over the next few days.
As of this posting the game feed is temporarily down and only showing what's going on at the Dragon Age 2 booth. Some idle chatter by BioWare employees can currently be heard. You can view the current feed at this url and later on the game should become visible again.
As of 5PM PST David Gaider is doing a live interview over the streaming video answering questions from users in real time.
The next interview will be at 10AM PST on September 4th.
I apparently messed up the link to the feed at first, sorry about that. It is now fixed.