I know it's an old thread, but it seems like a good place to add my "me too". I just installed
this aux adapter in my 2004 EX-L-RES. It has a mini-plug connector and an ipod 30pin connector, and connects to the CD Changer input. It doesn't interfere with the factory systems, including DVD. I tore apart a lot of the dash to try and figure out how I wanted the wires routed, but ended up going the simple route. I ran them down to the little storage cabinet above the power outlet. The cables store in that compartment when not in use, and I can even close it with my iphone in there as well if I want.
I did get a little bit of ground loop noise when using the mini-plug to listen to my iphone this morning, so I'll have to try not using the charger, or switching over to the ipod connector with a lightning adapter. Still, for the $35 I spent on this, it is a good product, simple to install, and probably the one add on I'll get more use out of than any other.