Diablo III Playable at BlizzCon

For those of you attending BlizzCon this weekend, you'll be happy to learn that Diablo III will be playable on the show floor. Shacknews reports:
World of Warcraft: Lich King is mostly a known quantity at this point, so any major WoW announcements would be a surprise. Blizzard was originally shooting for an expansion a year, but it seems unlikely we'll hear anything about a new update when the Lich King hype is still in full swing. Your guess is as good as mine.

Diablo III: According to show materials, Diablo III will be playable on the floor. Yeah.

I'm also expecting the announcement of another class, as well as plenty more details on the game. And a heart attack.