I liked this article, but no newer ones seem to be arriving or a book being written on the same idea. Maybe I bookmarked the wrong page (The first C is for Cocoa page) and can't see easily the follow-ups.
Are new articles and-or a book being written around this. I found it funny when I originally saw the article (the day it came out, too) that I had been griping for a year for precisely this fact. I had understood that it was universally understood that to learn Cocoa you had to learn C first. So I started trying to get a handle on C, but I did start reading in Objective-C and Cocoa and for half of the things I read for C I'd read something in the Cocoa documentation along the lines of "In C you would do this, but in Cocoa it's not necessary". Also a lot of the C don't assume you'll be using frameworks and libraries for a graphic environment, so I was able to make a little C program that would print some stuff to the screen in text but that had advanced me exactly 0% in transforming that into a Window in Cocoa that did the same thing.