CSS Box-shadow is one of the best CSS feature, as long as we don't overuse or abuse it, it's a nice subtle effect to have on a web page. If you're not satisfy with the drop shadow effect, check out this jQuery plugin - Real Shadow.
Real Shadow create photorealistic shadows. The author mentioned it's perfect for eye-catching demos and landing pages. The first thing that came into my mind was a thumbnail portfolio page with this realistic shadow casted on each item. It should be able to transform it into a pretty cool and attractive page.
It casts photorealistic shadows. :)