Yes, if you were around on Saturday, you know that the first round of BlizzCon tickets sold out, and sold out fast. Tickets went on sale right around 10am PST (which was 1pm EST), and sold out just about 28 minutes later. If the queue numbers are trustworthy, over 21,000 people (we've heard as high as 25,000 at a time) logged in to buy tickets that day, and from unconfirmed reports around the web, it seems like about 5,000 to 8,000 tickets were sold: most people who got in line around number 5,000 were able to pick a ticket up, and that was a few minutes in already. Some of those people are already selling tickets on eBay as well.
We believe (though aren't sure) that they'll be selling more than 15,000 tickets this year, since that's what they sold last year and they're using even more of the convention space. If that's true, then Blizzard probably went through only about half of the tickets, and will sell the rest during the second session on the 30th. But that's probably not much of a consolation -- given the frenzy around this last Saturday, there'll probably be more people trying for tickets, and given the prices on eBay, possibly more scalpers clogging up the queue. We'll see.
Update: Lots of people point out, rightly so, that I missed something in my guesstimates of how many tickets were sold: you could purchase up to five. My personal guess is that the majority of people bought only one or two, but even if you go with three as the average, 5,000-8,000 people in the queue is actually 15,000-24,000 tickets. Blizzard probably did sell the majority of tickets on Saturday then, not just half. So the process on May 30th will presumably go even faster.
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.