If you guys want something realy cool, I just converted my "05" TNR unit to operate with my rear view backup camera (automatic when car is put into reverse) as well as hooked it up to my DVD player, damn good quality video screen too, suprised the **** out of me, I thought it would only be so,so video, but its great. There are a couple of people making and installing units, but this one is the "real deal"
http://www.navwithtv.com/