First teased in Sneak Peeks some months ago, Griffin's Wave Cases for iPod nano 4G and iPod classic ($25) are some of the nicest we've seen for either model. The iPod nano version comes in two-packs, one translucent white or black, the other black or green, and the iPod classic version comes in a single translucent black version. As with the prior Wave designs, the design twist is a helix-like motif on the case, overlapping different colored shells,…
