Cool. You'll be interested in some of the hardware projects then. You'll want to check out some of the GPS stuff, the OBDII stuff, the digital output boards from stuart at Eutronix, Chimaera's stagnant USB project, PCA's tuner kits, the remote display kits and others.

EDIT: And if you're feeling really daring, maybe you want to tackle the hardware mods to output the display.