I like it. Great way to have a changing display.  I also have a wall that swallows every piece of art I put on it so I just gave up.  This could work for me.  One question, if you don't use the photo boards, and just use the bulldog clips, couldn't you grab the wire with the clip in the fat part and eliminate the s hooks? Maybe I'm not seeing something.  I'm not trying to be critical.  It is a great idea and thanks for sharing! 

I will try that grabbing the wire with the hook itself. I am not sure how it will look but it may keep the photos in place a bit more, rather than dangling so much.

Benmoore: The Theater in the Round had a display for their cast bios that used similar materials (but used glass to press photos) but did it in a different way.