Apple is set to kick off its 2009 Worldwide Developers Conference with a Keynote address, and iLounge will be on-site to provide live coverage. The Keynote, featuring Apple senior vice president of Worldwide Product Marketing Phil Schiller and other executives, will begin at 1:00 p.m. Eastern Time—10:00 a.m Pacific—and is widely expected to focus on the yet-unreleased iPhone OS 3.0 and Mac OS X 10.6 Snow Leopard, as well as the introduction…