Paid members of the iOS developer program who did not attend WWDC may want to head on over to Apple's WWDC 2010 video page. Roughly a billion hours (if my quick calculations can be believed) of WWDC session video is now available for download from iTunes. You'll be able to find videos on topics from application frameworks to graphics to core OS topics to dev tools. Sample code and slides are also available.
Please keep in mind that this material remains under NDA, so we will leave the content specifics as an exercise for the reader.
Go enjoy your videos!