Apple has at last introduced an official Apple Keynotes podcast through iTunes.

Until now, videos of Apple's keynote sessions have been made available after the event on an ad hoc basis, meaning interested viewers have had to look around to find the right feed.

The podcast currently includes episodes that feature video of the keynote addresses from Macworld Expo 2007 and 2008, as well as the iPhone Software Roadmap Event.

The new feed appears just ahead of Apple CEO Steve Jobs’ keynote address at WWDC today.