This looks really cool. I'm not sure if it would work with the Bose system though. Or even stock for that matter.
Dash - The Smart phone Car Stereo by Paul Lizer — Kickstarter
It says "Dash has 4 x 50w to power your speakers but also has 2 preamps running at 2V a front and rear/sub."
It doesn't specify anything else as far as connections and the amplification stage. Would we be able to make this work in our Z's? For the Bose system it seems like 2V would be really weak/low volume based on what I have read. That's of course with the bose speakers.
I won't be ordering one for the first run because I don't have an iPhone but this looks awesome when they get around to making new faceplates.