Here’s a device that might come in handy for dj’s looking to expand their libraries.  The miShare lets you copy files and playlists between iPods in an instant.  Transfer either the most recently played song on the host iPod, or the entirety of the On-the-Go playlist.  The only downside: “Locked DRM files are copied to the disk area of the target iPod, for fresh authorization with a valid password”.  Get yours here for $99.