I wrote up an article for Smashing Magazine on creating a colorful sitemap with jQuery. It covers all kinds of things, like semantic markup, enhancing with CSS3, building a quick jQuery plugin to avoid repetitive code, and more. Links to the example and the download are over there!
The article is also an introduction to me as a new writer over there. I'm going to be doing Question & Answer articles every few weeks or so. The focus will be CSS but I imagine that'll cover web design in general like we do around here. Details about submitting questions also over there in the article.