Thanks for all the suggestions. Looks like I've got a pretty good list of places to check out.
and for those of you who asked, here's a quick progression of the image:
The Devil in the Clouds.
1: Original RAW file out of camera, no post production.
2. Exposure and Shadow levels tweaked to bring out clouds in Camera
RAW editing. This became its own layer while the foreground (trees, joe
& jay) were processed separately.
3. The image was converted to B&W. Minimal "dodging &
burning" to bring out the Devil's features. Let me stress the "minimal"
part of the post production.