http://www.alistapart.com/articles/cssdropshadows

If an image has a jagged edge (say a gif with transparent background), can a drop shadow be added automatically with CSS to follow the edges of the image, without having to create a separate image for the shadow? Probably not.

If we're talking straight edges, can a drop shadow be added like in the above tutorial, that blends into a background texture, ie not a flat colour background? I need whatever shadow effect I use to blend in seamlessly (at least in modern browsers).

Jason