Not to like throw out something crazy, but do the pogo pins act as just a typical USB port? Charging and all? I have a double din headunit size, and I replaced it with a single din unit plus one of those empty trays. It's the perfect size for a my HOX slide all the way back. I was considering buying pogo pins, then using a little manufacturing, have some holes cut in the tray where my HOX would line up, then put a rail on the side so it stays in place. So then when I was in my car, I could just drop my device into said tray, get charing and audio right there. Kinda hard to visualize just from text, but it's a cool idea I promise.
Far out there, but I think I'd save a few bucks. My only problem is that 99% of stereo head units don't have a connection protocol for Android devices as opposed to iPods, etc. Don't get me wrong, I love my One X, but I still use the dock in my car for my iPhone 4, simply because it's easier.