In addition to demonstrating an interesting use of background images, this makes a point about how CSS has actually led to a simplification in web design:

It’s no wonder that pure text-based navigation, styled with CSS, is leaping back into web design. But most CSS-based tab design so far is a step back in appearance from what we used to do — certainly nothing to be included in a design portfolio. A newly adopted technology (like CSS) should allow us to create something better, without losing the design quality of previous table hacks and all-image-based tabs.