I did an album where by the 'pages' could be pulled out and displayed like an actual picture frames based on the concertina. The prints were only held in place by the ribbons I placed in the corners, giving the client option to move the prints around or change them.
You can have a look at the album here to give you a better idea of what I did
http://roziyunos.multiply.com/photos/album/95/White_With_Red_Roses_Wedding_AlbumsThe only cavet was that it was heavy and thick as I used boards throughout as I wanted it to be sturdy enough to stand up on it's own, and the prints I was working with that time were an 8 by 10 inches and I added on a 2 inch border, I think, all around.
What I liked about this design is that it's pretty enough to be displayed out and still works like a book.
http://roziyunos.blogspot.com