You know that we don’t run future iPod stories without having a lot of faith in the information. Thus far, our source has a perfect track record for accuracy. Based on the information we’ve received, this is what the fifth-generation iPod nano will look like, compared with its fourth-generation predecessor. As noted in the second image, the screen gets widened to a 1.5:1 aspect ratio, but still retains the Click Wheel of all prior nano…