I found more pictures of photo walls and am really loving this look!!! We used to have a photo wall on our old staircase but now I'm thinking of doing not just the staircase here, but the upstairs hallway and one in our master bedroom, too.
I've always used black and white photos with black frames (we think alike, Katrina!) but I am really loving some of these other combinations.
My foyer is eventually going to be yellow and probably the staircase as well. Love the yellow walls below with the black frames!

This is a really cool combination of frames but you'd have to use it with very simple furniture or maybe in a hallway so that it doesn't look too busy.
I love the blue walls with black and white!!!
Another cool eclectic grouping that looks great on a white wall.
I think I'm going to find some garage sales this weekend and see what I can find for some cheap frames. (And love the painting idea, Steph, to make them consistent!!!)