As updated versions of the company's past same-named products, Belkin's new Sport Armband for iPod nano 4G ($20) and iPod touch 2G ($25) are actually nicer than their predecessors, using an interesting mix of vinyl, neoprene and rubber to offer an iPod-enclosing armband holder with neat features. There's still a key pocket on the band, now joined by a rear card or cash pocket behind the iPod, and there are now two places to thread the armband depending…
