Apple today confirmed that its Worldwide Developer Conference (WWDC) has sold out for the first time in its history. The conference will be held from June 9th to 13th in San Francisco. Apple’s spokesman Bill Evans told Macworld, “response to this year’s WWDC has been off the charts and we are delighted with the show of enthusiasm and support from the developer community for the new iPhone SDK.” Apple has not given any details about the number of people registered to attend the conference, but in recent years, the number has ranged in thousands. The Developer Conference will kick off with a Keynote address by company’s CEO Steve Jobs on June 9th at 10:00 a.m.