i recently created this gallery wall for my mother, going up her stairway. i created frames that my mom can easily swap out the photos over the years. i used this method and, to mix things up a bit, i transformed old clipboards into frames. when hung horizontally, and by adding a bit of ribbon or rope, this idea is practical and pretty! (and, ehm, cheap)
p.s. that's my sister-in-law in the photo above. isn't she beautiful?