Each ticket not only gets you into the two-day convention (October 21-22, 2011 in Anaheim, CA) but includes a goody bag and the option to purchase limited-time BlizzCon merchandise before the show.
Once the tickets go on sale tonight, you'll have minutes -- an hour at most -- to head over to the BlizzCon website and place your order. Blizzard is limiting you to only four per household, so if you have a group of friends who want to come, they'll need to coordinate their purchases as well!
This is the sixth BlizzCon since the event started in 2005. Last year's BlizzCon admitted over 27,000 fans to the shindig.