For those pondering drinking the CSS Kool-aid; take a look at the CSS Zen Garden. They've got 100 different designs, all using the same HTML page, just different CSS. Design 99, Wiggly the wonderworm, turns a normal web page into a comic strip! So, by changing one file (your CSS file) you could completely change the entire look and feel of your website. For an example of how not to design your page with CSS, look at my current journal style.