General Motor's Chevrolet and luxury retailer Neiman Marcus will showcase a special edition of the carmaker's pony car, the Chevy Camaro. It will be on the catalog as the ultimate holiday gift, part of the annual Neiman Marcus 'Christmas Book.' Called the 2011 Chevrolet Camaro Convertible Neiman Marcus Edition, it will make the Chevy pony car even more attractive. Only 100 units will be