Yeah that sucks. I wish it were the simpler DIN connector. And Xterran, I know it is a long haul building these things, I've been making these systems for cars for over 4 years now. Just that this is a new vehicle that I spent $42000 on and I don't really want to spend another $500 more to get a head unit with RCA AUX in. I have been running my current system for a couple years, but with crappy old FM Modulation, in both this Pathfinder and my last vehicle a Honda Civic SiR.
The best system I have built to date, still has to be the first one I ever built. It was a DOS box, running a P120 CPU and would boot in like 6 seconds. Too bad it was controlled by a KeyPad and only played MP3s. My current system is a couple years old now, plays MP3s, DVDs, DivXs, games, etc..etc..etc.., but not nearly as nice as come of the new Mirco ATX board systems that are out there, like a friend of mine here in Vancouver has built. You can check his out at
http://cobaltcarpc.com/ , we may be looking into producing these things....but would be a lot of work I think.