That plug is great if you want to hook up a real iPod. Unfortunately since you're trying to use the empeg as an iPod you'd probably be looking for the OTHER connector. The one that's on the iPod itself. I haven't seen those anywhere before, nor can I think of any reason besides emulating an iPod with another device for them to be available. That's probably not something Apple would like (commercialization of other devices that used the iPod connector), so I suspect it may be difficult to find anything. Perhaps someone has made a homebrew solution (like the Pfranc guys that make GPS plugs)

Bruno