In a time where XHTML/CSS is being bashed from left and right, mezzoblues css Zen Garden: The Beauty in CSS Design is a much appreciated initiative.
The garden showcases some of the big strengths (and some of the big weaknesses) of purely CSS-based designs. It shows exactly how flexible your solution can be, when you separate content fand presentation.
Newsflash: The Garden even works well in Lynx.
Wow. Thats actually quite amazing.