Legitimate Cloaking Technique

I came across a blog today using an ingenious "cloaking" technique. He's stuffed his "about" page at the top of all his pages and then hidden the section using javascript. So when you click on his "about" link, the top part of the site scrolls down to reveal information about his site, rather than going to a new page. Here's what the Red Cardinal blog looks like before clicking on the about link. Here's what happens after you click the about link. I'll be sure to use this technique on my sites from now on.