Box-shadow is a pretty powerful property in modern browsers. With just six little values, you can make some really neat stuff. How much neat stuff, you ask? The result is 39 Ridiculous Things To Do With CSS3 Box Shadows that, due to whatever issues, can only be viewed in Chrome 11 or better.
You can navigate with the arrow keys, and he has moved the CSS for each object into the object HTML, which should make it easier to look at particular effects.
Requirements: Chrome Browser
License: License Free