From the press release:

The five-day conference includes the first ever iPad™ development sessions and hands-on working labs for iPhone® OS 4, as well as Mac OS® X core technology labs.

Interestingly there isn’t going to be any Apple Design Awards or sessions for Mac OS. It’s becoming very clear that Apple sees a huge future for iPhone OS — Mac OS X is old news. As a Mac fan I’m a little sad about this bit of news, however, as an iPad and iPhone owner I’m excited to see their focus shifted towards something new.