Some pretty awesome book shelves. I personally want floor to ceiling shelves covering at least two walls in my spare bedroom. until I upgrade from condo to a house with a full-blown library / reading-n-nook room :D
DIY Wall Shelves of Used Drawers. I like this idea for repurposing drawers. Might be able to find an old dresser that has seen better days, with scuffs or crackers but that has interesting drawers, that I can pick up for cheap at a yard sale.