Looking for heat management and related stuff, besides graphite foam (and its disadvantages, like dust intolerance), I also found this interesting patent:
http://www.faqs.org/patents/app/20110198070
about "MOTOR-VEHICLE WITH AN AUXILIARY COOLING SYSTEM INCLUDING ONE OR MORE RADIATORS CONSTITUTED BY VEHICLE BODY COMPONENTS"
it comes from FIAT. Will we maybe see soon a racing application of it?