Why do you have an appendix in a one-page article? Seems pointless. 
pointerless even
/bad pun (cut me some slack, I'm still asleep)
Pointers are a very in depth subject Joe, I really doubt you can make someone that has never heard of them grasp the concept in one page. That being the case, I strongly believe that the best way to learn something is to teach it to someone else. There are a lot of technical articles about pointers around, perhaps you should read a couple of them before writing a condensed/ less technical version.
