RE: The Cocoa Name
Firstly, yes you're right about CoreFoundation / Foundation. That was a typo: I was thinking about the layer kit and Core Animation while writing Foundation! As you say, iPhone apps primarily use Foundation and UIKit, although CoreFoundation is present, at least on 1.1.2.
The NIB thing is more interesting. I've pulled apart several iPhone apps, and not found a NIB yet. As far as I can tell, most apps hard-code the position of each UI element. Calculator, for example, has a method called [CalculatorController init] which laboriously lays out all the buttons used by the calculator in their hard-wired positions. This, I suspect, is the reason you can't just rotate your iPhone and get a landscape-oriented calculator. It's just a major hassle doing this once, let alone twice! Hopefully, the official SDK will have some sort of GUI design tool which lets you lay out a window graphically, and then at least spit out a chunk of Objective-C which you can then paste into your app. But then again, maybe we won't have that, at least initially....
So why no NIBs? I guess the short answer is reducing the code footprint. The business of bringing in a NIB, parsing it, auto-generating the various controls and then linking up the actions, etc, is a lot of code. Maybe in iPhone 2.0 ?