If you're sitting at home mashing your refresh button on our coverage wiki instead of attending BlizzCon '08, here's a chance to get in on the action!  The official BlizzCon page has this offer :

Here's your chance to participate in BlizzCon even if you aren't able to be there in person. We're now asking folks to submit their burning questions related to the Warcraft, StarCraft, or Diablo game universes. We'll sort through them all and pick the best questions to be answered live during DIRECTV's pay-per-view broadcast of BlizzCon 2008. If your question is selected, you'll also receive an ATI graphics card and some exclusive BlizzCon merchandise. For submission information, contest rules, and a list of prizes, visit our contest page.

Good luck!  And let's hope we hear something regarding Duel Speccing soon!