With the biggest changes to the prior design that we've seen in years, DLO's new Jam Jackets ($20 each) come in a few different versions. The basic one for iPod nano 4G is a grippy black rubber case with seven ribs on each of its sides, and depressions in its back, thickening the nano while removing its dull knife-like sides. There's a similar version for the iPod touch 2G with the same seven ribs, only enlarged, and with wider depressions to match…
