Three silicone cases previously released by Incipio for the iPhone and iPod touch have just received modest revisions for the fourth-generation iPod touch. Available in several different colors, Microtexture ($25) was introduced last year as a unusually grippy iPhone 3G/3GS case design, using rubber in an almost furry texture to maximize the user's ability to hold what would otherwise be a slippery-backed device. Sold only in light blue, Pillow…
