Atlantic has announced its iceBar Waterproof nano Speaker Case, sibling to the EGO Waterproof Sound Case for iPod. The iceBar is a completely waterproof, floating, two-speaker system for first- and second generation iPod nanos. Features include a flip-out leg, nylon wrist strap, a miniature “buoy,” shatterproof polycarbonate body, Click Wheel membrane for control of the nano when it’s secured in the case, and external mute and power…