Using a unique background pattern first seen in an earlier iPhone 3G case, Belkin's new Sonic Wave Silicone Sleeve cases for iPod nano 4G ($20) and iPod touch 2G ($25) blend two colors into their backs, with the rest of the case appearing in a single color. No screen or control protection is included; the iPod nano sample we received didn't quite seem to be a perfect fit for that model, but it was close, while the touch version seemed fine.
