I think Creaulx meant was this scenario:
Let's say someone has an iPod and iTunes, and their computer crashes (thus all of the music is gone). If someone were to download iTunes after the crash (or a new PC) and try to sync it, since iTunes has no music (thanks to the PC crash), the iPod would lose all of its songs as well. Thus, it would be great if MB had a feature that allowed someone to add their songs from the iPod back to the computer.
There's
Music Rescue, which is nagware, but it explains what I believe Creaulx wants MB to do.
EDIT: I'm not sure, however, if this is legal or not though...