I've been searching for other high contrast photos and noticed that HDR (High Dynamic Range) photos produce a similar effect to my manipulated digital photos.
I'm planning to produce some 11x17 posters of the photos and may put some up for sale soon.
I've placed another photo up on my site. I'm really getting into doing these. It takes me hours sometimes to achieve the effects you see in the finished artworks. They often stray quite far from the original snapshots. Check them out.