Activision Blizzard has announced that it will not be attending E3 2008, but that's not the reason for all the sudden, ethereal screaming. The cries of pain originate from the second part of the announcement:
Update: It turns out that Blizzard's non-participation is part of something bigger: Activision and Vivendi have completely pulled out of the ESA.
Update 2: We've contacted by a representative of Blizzard entertainment requesting some corrections. He pointed out that the merger hasn't yet gone through yet, and that they actually have no intention of attending the event at this time.