Well, Blizzard did say that each attendee will get a beta key for an upcoming game. Logic says its starcraft 2 since its the next one in the pipeline. So what are you waiting for? get Ready for Blizzcon!

All BlizzCon attendees will receive their share of free Blizzard swag, to be announced in a future update. We'll also be providing a beta key for an upcoming Blizzard game. If you're not enticed yet, you should definitely check out the in-game murloc suit below, an item that can be redeemed and given to your favorite World of Warcraft character. Love or hate the murlocs, you won't want to miss this opportunity to blend in with them!

First up, is the revelation that every attendee will receive a beta key to "an upcoming Blizzard game." Hmm, I wonder what that game could be. Now, I'm not saying for certain that it is Starcraft 2, it may be the next WoW expansion. But I think it's a safe bet that you'll be zipping up a spacesuit and picking up a blaster bigger than your grandmother's station wagon after this convention is over.

Next up is a unique item no one expected to see. Every Blizzcon attendee will receive a special passcode. Once in-game, the passcode can be redeemed for, drumroll please, a murloc suit for one of you characters. Good for the spirited RP event or for spicing up the dragging-on-until-you-want-to-/gquit guild meeting. Maybe even handy for that next machinima piece you were brainstorming.

via Wowinsider