Has anyone done this? It's basically a full screen touch radio that extends the iPhone4/4S into the dash, currently a snip at around £150. I see people over on passatworld have and it looks the dog's, but install seems a little tricky. I've just fitted a 3.5" socket as an aux-in thanks to excellent instructions from Brind so I'm not averse to a little harness hacking if needs be
http://www.pioneer.eu/uk/products/SPH-DA02/print.html
Cheers
Witchy