I made myself a little iPhone car dock, so thought I'd share my experience. Its basically a universal dock adapter clip-in (£9 or $9, i don't get the apple exchange rate!) and a bit of super-glue. I have an Alpine head-unit, with direct iPod connector. I had to cut the hole in the dock a bit bigger to fit the iPod cable dock through and it still connects to my iPhone. Just got a sharp blade and hacked away until it fitted well enough for the cable to come through far enough for my phone to connect. Then just a bit of superglue to attach the cable to the dock adapter. Then a tiny bit more superglue to attach the dock adapter to my car. I hung it over a cup-holder, and it fits like a dream, and there's enough room for the dock cable to come down and out the back. Sorry about the last pic, it's dark out. And sorry i haven't got a pic of my iPhone in the dock, the iPhone's taking the pictures.