This link to a great presentation from Seybold was posted to the #plone channel a little while ago. It's great!

Why tables for layout is stupid: problems defined, solutions offered

Looking at the HTML code for that I saw this weird JavaScript that looked like a code obfuscator... turned out it was actually a tool for trying to hide email addresses from harvesters! Sweet.

A week or two ago (can't remember now), I redid the Tyrell site using CSS. No tables at all. It's not online yet, I had to stop work on it for client projects, but hopefully it'll be online sooner than later. The goal was to replicate the current site as closely as possible using CSS. It's almost completely identical, and it's tested on a bunch of browsers and platforms.