One of the new iPod nano features that Apple didn't bother to illustrate much yesterday is the integrated pedometer, and if an updated Nike+ iPod user guide is to be believed, that ain't the only fitness-related extra that the 5G nano will be good for. As the image above so clearly shows, a Nike+ compatible heart rate monitor could be on the way, and it'll function exclusively with Cupertino's only camera-toting iPod. AppleInsider was told that th