Trying to lay out my setup and I can't find any info on this, so I guess it's going to be a long shot. Since I don't have the z120 yet, I'm hoping someone can share their experience.
I'm hoping I'll be able to leave my 240GB ipod in the glovebox (tinyurl.com/36gu5u4 if you're interested) and still connect the phone to share data/screen/audio for playing stuff off the internet or from my computer at home. It wouldn't be difficult to frankenstein a y splitter cable from http://www.cablejive.com/categories/Car-Audio/ but getting it to work probably will be.
If all else fails, putting a switch in to keep only one connected at a time would have to work right?.. From what I see, a double throw four pole switch is what you'd need. I don't think this way would keep both charging, but maybe there are alternatives.
I've read hubs don't work, but since ipods play more nicely with the unit... maybe this will?
I've searched but it doesn't seem like anyone else is trying this, from what I can see. So any ideas, info, or suggestions would be <3ed.