In the recent September 2006 Martha Stewart, there was an interesting "good thing" regarding stacking benches. If you've been looking for bookshelves and have found that everything is either too big, too tall, or too wide (or not wide enough) for your space, consider stacking some benches. The "Squat" Module bench, designed by Vessel is a great example. It's compact enough to be a two-seater (perfect for a foyer) but if stacked, the small size also makes it ideal for a nightstand.
If stacked even higher, it becomes a great little bookcase. What makes the "Squat" even more practial is that the metal legs are open, creating a perfect spot for books or cds, as well as giving it additional support and stability. Available online here.($145)