If you have even the slightest interest in the iPhone SDK be aware that Apple's servers are getting slammed from every direction. I finally got a download to start after a few hours and am about 5 hours away from completion. In the meantime, the marvelous asap18 got me a sneak peak at the frameworks and I'm sad to report that class-dump is not working on them and that the public frameworks are very limited indeed. UIKit for example went from over 300 headers down to 31.