Sold in three separate versions, PDO's new Sporteer Armbands ($25 each) are simple black neoprene sports holders with touch-through clear plastic faces. An iPod nano version is designed solely to fit the third-generation nano, with holes in the top and bottom, while another version is for iPod classic and fifth-generation iPod owners, and yet another is for the iPod touch and iPhone. Only the iPod nano version has a hole for Dock Connector access,…