I know there are aftermarket heated seat kits out there but here is a blown up schematic of an MDX seat. The heater units are modular and would probably fit perfectly in the Pilot seat. I wouldn't recommend doing this yourself but a good trim shop could easily wire them up for you using all Honda switches, relays and key parts. Just a thought for those potentially cold buns out there.
http://www.acuraautomotiveparts.net...+MDX&catcgry4=KA5AT&catcgry5=FRONT+SEAT+(L.):
http://www.acuraautomotiveparts.net...+MDX&catcgry4=KA5AT&catcgry5=FRONT+SEAT+(L.):