Griffin Technology today announced that its iClear and Disko carrying cases are available for Apple's second-generation iPod nano. The iClear features a hard, clear, and lightweight polycarbonate enclosure to protect the portable player from scratches and dings while offering complete access to the clickwheel and ports. Disko senses movement, responding with colored lights that blink and flash in moving patterns around the clickwheel. The lights are powered by batteries (included) so as not to interfere with iPod playback time. Griffin's iClear is priced at $20, while the Disko is available for $30.