[dcb]

You can hack in some sensors to the mpguino or the obduino, they both have a couple analog pins to spare and can be hacked to have even more, but you will have to maintain your hacks.

The display code isn't difficult. gotoxy, lcdprint, etc. might need to tweak a couple hard coded values to get it to work right on a larger display. It will probably work with a 4x20 or a 2x40 by default (if the controllers are compatable) but just wont take up the whole screen.