You'll notice that the options run the gamut, from an expansion named Cataclysm (a pretty safe bet) to seeing Ozzy play a Blizzard game (not so likely). Almost all of this stuff is probably available somewhere on the convention floor, though you'll have to really look to find everything.
And if you do win, make sure to find one of us from WoW.com at the show and show off your finished bingo card. We might just have a nice prize for you, from a pat on the back to something even better.
BlizzCon 2009 is coming up on August 21st and 22nd! We've got all the latest news and information. At BlizzCon you can play the latest games, meet your guildmates, and ask the developers your questions. Plus, there's some great looking costumes.