Don't worry, there will be loads of pics!
Carputer is currently a laptop with screen removed and lid sensor connected to relay which closes with ignition on. Trying to decide on touchscreen,decrease boot time,write a nice GUI and decide if it should power off or go into sleep mode when engine is switched off.
I imagine I will be dedicating a thread to it, I am a bit of a nerd so hopefully there will be some kind of home/car wifi connection, remote start and some other crazy ideas as I think of them!!