Looking for something completely different on the Internet I found the following binder storage systems:
While if you look at the prices, you may be shocked, I liked the idea behind this type of storage. While I have often seen circular bins for shop hardware storage (screws, nails, and such) I have not considered this for binders. It is particularly appealing since binders don't really store well on shelves (they waste space around them). It seems like it would be simple (or at least better than the prices listed) to engineer a similar system, and as I have many binders, it looks like a good solution.