Methinks "Computer Programming" or "Information Technology" would be a better title for this section than Computer Science. They are more general and applicable to the content.
http://www.quora.com/Khan-Academy/Is-there-a-Khan-Academy-li... (warning, turn off the "spy me" flag ;))
Computer Science and programming are not separate... Programming is just one part of it.
Right now, at first glance it just looks like the Khan "Computer Science" curriculum is solely about learning how to make drawings and animations with processing.js. It can be a bit confusing to the first-time visitor, who might be asking "What is this page going to teach me exactly?".
It's cool, regardless, I'm just personally a bit of stickler for calling things Computer Science. I think the term is overused to the point of losing its original meaning.
For instance, I just published a Turing Machine simulation (http://www.khanacademy.org/cs/turing-machine/938201372) and we have a random walk simulator (http://www.khanacademy.org/cs/random-walk/803118438).
"When I look back at how I became interested in programming, or ask other programmers about how they started to program, the answer is very frequently: “I was given a [Basic/QBasic/Python] compiler and a bunch of programs and I wanted to understand how it all worked so I could write my own!” It was only after digging in to the code that the student wanted to understand how to tackle certain programmatic challenges – but they then did so with great gusto!"
Which sounds great, but speaks directly to what cantankerous mentioned: this is more about computer programming than it is about hard Computer Science. Programming is just a subset of CS, and I've personally known several CS researchers who haven't touched code in years. This topic has been beaten to death, but this approach is conflating the tool (programming) with the study (CS). I realize that there's much more to come, but the introductory material that I've viewed thus far does nothing to dissuade me of this fact.
Again: I think that this is a laudable effort, and hopefully will encourage many more youngsters to get into programming. I was just hoping to see material more along the lines of computer numerical methods, computer architecture, data structures and so forth, that would be a true introduction to the wider world of what CS is.