oh yea, the fuses, I kind of left that off sorry. I have mine fused at the battery, just before the relay, and back by the carputer, fusing is a good idea and I certainly agree, you would much rather blow a fuse than a touchscreen. heh, btw.. your xenarc cig. lighter plug has a fuse in it.. but the a/c adapter does not.. if you use the a/c adapter at all for the screen and something is wrong.. it will fry the screen. I'm speaking from experience there :P
sebbery, is that still an ITX mobo? I haven't seen any that small, I'd like to see pics of that that would be very cool. I have heard that plexi is not a very good material for cases by the way it handles heat, but I dont recall any technical explanation on that one.
oh yea, for keyboard and mouse I got a small all in one RF keyboard called a "scorpion" apparently.. its a rebadged no name into another no name lol, but it has a full feature keyboard with an analog stick like a psx controller has to use for mouse pointer. It works very well if you just cant get your fingers on something on the screen. but you need to keep the receiver close to the keyboard or you get a lot of interferance (from my experience) I got it from www.pcalchemy.com
he sells a lot of them there, mostly for HTPCs I think.