"If attending this year's Worldwide Developers Conference just wasn't in the cards, Apple has produced a collection of videos that cover all 126 instructional sessions from the conference. While WWDC ticket holders get free access, those who missed out can buy the videos via ADC on iTunes."
The videos were divided into two groups, one on Mac development and the other on iPhone development. Each group is $299.00 USD, but you can buy all the videos for $499.00 USD. To do this, however, you have to be a registered ADC member or iPhone developer, which isn't too hard since you can become an online-only ADC member for free. The Mac sessions total 13GB, the iPhone ones total 17GB so prepare yourself for some long download times unless you have a FIOS connection or something fast like that.
WWDC '09 Instructional Videos Available on iTunes
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