Wood has long been used as a premium material in cases for iDevices, and Primovisto's business relies upon it. The company is now offering Bamboo Bookcase for iPad mini ($54-$64), a folio-style design. Rather thick, it sandwiches the tablet between pieces of wood, using cloth to cover the spine. Buttons and ports are deeply recessed within the frame, but still accessible, and there's an elastic band to hold the case shut. Customization options areā¦