3rd party sticker companies have continued capitalize on this form of expression for years now. On the other hand, some of us continue to feel that putting a little graphic on an already well-designed product is a slap in the face to the industrial designers.
You could also custom your iPod or iPhone - the possibilities are endless when it comes to easy-peel vinyl stickers.
For the curious, the skins featured in this article are all done by European vinyl skins makers Skinizi. Their skins are reasonably priced at about $30 bucks a piece. They're cut and shipped from Europe, so expect about week's wait when ordering.