Last Tuesday's iPhone 3.0 Software Sneak Peak Event [iTunes link] is now available for download from the Apple Keynote feed. If you subscribe to that feed, it should already be served up, piping hot, in grand, glorious H.264 format for you
scrutinize pixel by pixel enjoy.
If not, you can head on over to the Apple Keynotes page [iTunes link] and hit the download button. Also in the feed are last year's WWDC iPhone 3G debut from June, iPhone SDK Roadmap Event and 2.0 Sneak Peak from March, and the both WWDC 2007 with iPhone WebApps and Macworld 2007's iPhone unveiling.
[Thanks Danny for the tip!]