Apple opened ticket sales at 8:30am EST on its WWDC website and by 10:30am posted a notice reading: "Sorry, tickets are sold out. We'll be posting videos of all our sessions shortly after the conference, so everyone can take advantage of the great WWDC content for free."
The event takes place June 11-15 at San Francisco's Moscone Center, which typically accommodates about 5,000 WWDC attendees.
For those attending, the ticket price is $1,600, and this year Apple is not allowing buyers to resell their tickets. In the past, tickets for the sold out event have quickly surfaced on eBay for as much as three times face value.
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There's widespread expectation that the company will announce details on iOS 6.0, and widespread hope it might announce the iPhone 5 or whatever the next iPhone model will be called. Though many observers think next fall is more likely for the latter.
The event, open only to registered Apple developers who agree to a non-disclosure agreement, is among the hottest tickets in tech alongside Google I/O, which sold out in about 20 minutes this year.
On the Mac side, the main focus of the event this year will be the newest OS X release, Mountain Lion, which includes a number of UI changes and features imported from the iOS mobile platform.
Other planned events include 100 hands-on labs, with over 1,000 Apple engineers to work directly with developers at the code level and the Apple Design Awards to recognize excellence, innovation and design in software applications for the Apple platforms. Sessions will focus on everything from Safari and the Web to Core OS to App Services.
Network World Senior Editor John Cox contributed to this report.
Bob Brown tracks network research in his Alpha Doggs blog and Facebook page, as well onTwitter and Google +.