Apple announced this morning that its 2012 Worldwide Developers Conference is set to take place June 11 at the Moscone Convention Center, but the event’s $1600 tickets are now listed as sold out within two hours of going live. In 2010, it took roughly a week for tickets to sell out, and last year it took about half a day. Tickets were limited to one per person, or five per organization, and are non-transferable and non-refundable.