Were you hoping to see Dota 2 or even Half-Life 3 at this year's E3, you might want to stop holding your breath (seriously, you're getting blue in the face). Valve have just sent out a mail stating that "no appointments will be needed" during E3, since they won't be showing any titles at the convention. Doesn't mean they won't be there, and you never know if Gabe Newell will suddenly pop up at some press conference again, but we should all stop hoping for any announcements.