A much-improved version of Apple's earlier iPod nano Armbands for first- and second-generation iPod nanos, the iPod nano Armband for third-generation video-ready nanos ($29) still comes in gray and uses a perforated soft fabric design. Apple now covers the nano's entire face, however, with two joined-together types of soft plastic: the screen has a clear plastic protector, while the Click Wheel has a translucent matte-finished covering. The rest of…