TrailRunner

You might have read the press-announcements for Nike and Apple creating a new extension to the iPod Line. It's a piece of Hardware, basically a smart pedometer inside your shoe and a software update for your iPod Nano. The software tracks the usual data like time and distance and includes some kind of voice comments. Additionally Apple offers a new set of workout playlists in iTunes for your training and inspiration.
The software update for the Nano will include a new menu item, "Nike+iPod," which allows you to choose your workout distance and select your playlist.
Even if it's cool to hear some motivating tunes during your workout, how do you know what the 5 miles course is? It's clear: TrailRunner is the next perfect addition. Could someone please tell Apple and Nike?