LOL @ Hikermor!

Good idea about the digital camera. Do you use a system to remember what way you're facing when you take the shot?

Blackberry or cel phone memory often lets you rename the pictures, and that could be a useful way to index them. I haven't seen a camera that does, but there's probably a way to keep track at the time of shooting that I haven't thought of. (a sign in the picture maybe, to act like a lable?)

I love the idea of having a library of pics, in trail order, that you can refer to on the fly! I recently had to lead a hike in an area I was unfamiliar with (the intended leader, who knows the place like the back of his hand, had an accident and couldn't make it at the last minute.) A photo reference would have given me more piece of mind.