Over on YouTube, the Steve Jobs Keynote from MacWorld 2007 has been posted. It is divided into 9 parts. I am including all 9 links here for your viewing pleasure. The official keynote is on the Apple website. Apple has also posted the iPhone portion of the keynote here:

Part 1 (Intro)

Part 2 (New UI – leapfrog product)

Part 3 (iPhone design)

Part 4 (Widescreen iPod)

Part 5 (Reinvent the phone)

Part 6 (SMS & Pictures)

Part 7 (Internet communications device)

Part 8 (Safari)

Part 9 (Google Maps)