Do it! An AMA session with Mike Ferguson! What would you want asked?
Also, the article that that links to has more neat infos. I really liked this:
A few people wondered if WvW has a day-night cycle, and it does! Let me tell you this: seeing a trebuchet fire in the night is something you have to experience. Words just can’t accurately describe the sight of a giant flaming arc of doom sweeping across the night sky!