Good article, great ideas. I have two bookcases in the living room with all of the kid's books in them. The bookcases stand about 4 ft tall, similar in height to what you'd find at a library. I've started standing various books on top of the bookcases, "highlighting" them for the kids. I rotate them, so that the kids can grab them easily. It's fun, I like doing it.
Another idea I saw is to use old books and actually make decorative accents out of them. It looks cute and pretty easy to do, I saw it on a blog I follow. Here is a link to the blog that has instructions and pictures on how to do it if anyone is interested: