ZAGG has introduced its new line of ZAGGskins for the iPod, iPhone, and other portable devices. Based on the company’s invisibleSHIELD protective film, ZAGGskins feature the same custom fit and protection, but with the addition of a customizable image. Users can upload their own high-resolution photos or images to be used on the ZAGGskin, or can choose an image from the company’s existing library of designs. ZAGGskins are available now…