Fruitshop Bone Collection Nano3 Cube
Don't be deceived by the name: the Nano3 Cube is not a cube. Rather, the front features a distinctive chessboard pattern. The case's design leaves the screen exposed, though Bone also includes a thin adhesive film that you can affix; the Click Wheel is covered by the case and even features raised markings over each of the wheel's buttons. The back of the case has raised bumps that make it easy to grip and also has a small hole for hosting a lanyard (not included). The bottom edge of the case leaves an opening for getting at all of the ports and controls there: the hold switch, dock-connector port, and headphone jack.
Overall, the case itself is thin, not adding a lot of bulk or weight to the nano. It's enough to keep the nano pretty well protected too, though I would have preferred a hard plastic screen protector over the adhesive film. Otherwise, however, the Nano3 Cube is a solid silicone skin at a pretty reasonable price.