Here it is -- the first fourth-generation iPod touch case in the United States: Gumdrop Cases' Moto Skin for iPod touch 4G ($25) started shipping in small quantities yesterday, the same day as the iPod touch 4G arrived in stores. While it's not surprising given the fact that Gumdrop had it ready before Apple even announced the final design, Moto Skin doesn't have a hole for the new model's bottom speaker grille, but it impressively both fits the slimmer…
