Uhhh...
From Apple's press release of the WWDC '08 keynote
"CUPERTINO, CaliforniaMay 13, 2008Apple® today announced that a team of Apple executives, led by CEO Steve Jobs, will kick off the companys annual Worldwide Developers Conference (WWDC) with a keynote address beginning at 10:00 a.m. on Monday, June 9, 2008 at San Franciscos Moscone West. This years WWDC will showcase two revolutionary development platforms, the ground-breaking innovations of OS X Leopard® and OS X iPhone, the worlds most advanced mobile operating system."