Well, since Mark suggested it and since I'd never really done it before, I went out and shot some in the fog around my apartment complex. It was essentially a series of experiments in contrasting light sources, white balance, my balance (lots of long shutter speeds), etc. The pictures aren't magazine-quality (and some are more fog-centric than others), but I figured I'd post them here being as that's the blog's purpose.
That's a link to the slide show of the album, and you can click on any picture to view it bigger.