How to Hack Where's Waldo

Slate has a nice article about how to use an objective method to determine the optimal search pattern for Waldo. There are certain places where Waldo will be more than half the time, so you look there first. I can't wait to try this out on my kids. It also may be a good teaching exercise for a stats class ... or even a psychology, or design class? Are there other methods of analysis we can apply to Waldo's xy coordinates?