Hear what iPhone SDK authors Chris Adamson and Bill Dudney have to say on this week's podcast. They'll discuss Apple's design patterns and their feat ofgetting the 3.0 beta book out on the same day Apple publicly released the SDK. You'll also hear about the advantages of the new programmable GPU, the new availability of Core Data and AV classes for audio apps, in-app purchasing, plus what didn't come in the new 3.0. Chris and Bill will talk about how the iPhone programing model is significantly different from desktop programming, and offer some thoughts on what's coming next.