Apple has launched an official Apple Keynotes podcast ahead of CEO Steve Jobs’ keynote address at the Worldwide Developer Conference on Monday. Currently the podcast contains video of the keynote addresses from Macworld Expo 2007 and 2008, as well as Apple’s March 6 iPhone Software Roadmap Event. As the company typically posts video of such events online a couple of hours after they conclude, video from Monday’s event will likely appear in the podcast sometime Monday afternoon or evening.