Incipio's latest iPod armband is this one -- the "Performance Armband for iPod nano 4G & Nike+iPod Sport Kit" ($25) -- which as the name suggests includes a compartment sized specifically for the fourth-generation iPod nano when equipped with the Nike+ Dock Connector, as well as a shoe pouch to hold the Nike+ Sensor. Incipio's shoe pouch is a little different from others we've seen, a fully rubber holder that keeps the Sensor inside and has the laces…