Hello everyone!

I was wondering if anyone knew of a whitepaper or document from a reputable source that details the implementation of this glorious thing called the iPhone, specifically I'd like to see the OS X details.

The two reasons I would like it is 1) would be a great resource for classes this semester (reports and all) and 2) I hope to contribute some software and this could be a good starting point (guitar tuner and metronome comes to mind)

Thanks so much for any response/ideas!