OtterBox has introduced its new Armor Series case for the fourth-generation iPod nano. The new Armor case offers drop and shock protection, waterproofing up to three feet, and complete dust intrusion protection, as well as rubber padding that wraps around all sides of the nano, a thin, waterproof membrane covering the Click Wheel, a standard pass-through headphone port, and an included belt clip and lanyard. Available now in clear with white accents,…