Do you intend on buying tickets to BlizzCon? If you do, then get ready, because today at 7:00 pm pacific, you can attempt to do that very thing. If you don't manage to get your hands on tickets, don't immediately despair, for a second round of tickets will also be available this Sunday, May 10th. From what I understand (having never actually managed to go to BlizzCon) it can be pretty crazy when the opportunity is presented, so you can make use of these resources to try and maximize your chances, also provided on the Blizzard official site.
Best of luck to everyone out there trying to snag those tickets. Remember, that's 7:00 pm Pacific, through the Eventbrite site.