XtremeMac today introduced for Apple's iPod nano. The durable silion case offers protection against scratches and bumps, and protects the screen and Click Wheel with optional inserts. The two-tone, form-fitting case features stylish ribbed sides that "not only looks great, but also provide a comfortable and secure grip. The tactile finish prevents your iPod from sliding on surfaces like the dashboard or center console of your car." The company also says that the rugged styling provides prevents slipping and that it features an open design that provides access to all controls and ports. The case are now available for $20 (with a lifetime guarantee) and are expected to begin shipping on December 19th.