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.
For Blizzard's part, they tell the OC Register that they think it went pretty well -- their PR spokesperson says that from an anecdotal viewpoint, things worked fine. Which is what we see from our side also: while there is plenty of disappointment from people who couldn't get tickets, things went fairly smoothly, and at least it was only a half hour of waiting rather than a few days' worth. The Register also points out, though, that Blizzard never posted about the ticket sales on any of their pages until after the tickets were sold out. Of course we had lots of news (and we'll be covering it closely again on the 30th), but if all you were watching was Blizzard's official pages, you might have missed the whole thing.