I just ordered and installed the ProClip for the 370z. It was very easy to install and is a great alternative to replacing the stereo. I also ordered a line out since I've heard the sound is much better using that than the headphone jack. I'm still waiting on the tilt/swivel piece for the ProClip and the LineOut for the iPod. I'll post a reply and a pic once I get those...
Here is a list of the parts I ordered:
ProClip Mount
ProClip iPod Holder
iPod LineOut
Griffin PowerJolt