Like many other stickers we've seen for past iPods, NLU Products' new TatSkinz ($15 each) are one-packs of front and rear decorative stickers for various iPod and iPhone models. Rather than claiming to offer comprehensive protection, NLU bills TatSkinz as a nice visual add-on to its fully protective clear skins, allowing you to choose from different patterns that cover most of each device's front and back, but not their sides, tops, or bottoms.…