Separation of look N feel and content

I wrote about using CSS and Learning Objects back in September last year. In that post, I referred to a beautiful website called CSS Zen Garden. Now a book The Zen of CSS Design has been written describing how each of the designs were done. See a review of the book here. Here are the interviews of the authors Dave O'Shea and Molly E. Holzschlag.

CSS is an important technique for separating content and look and feel. Fablusi makes extensive use of the technique. Here are two views of the same simulation using different CSS template:

You may notice that the look and feel of the two screen captures are very different, but the content is exactly the same. The navigation is also different, one has the communication tools on the top while the other is at the end of the menu blocks.