Ok, even if you turn up the heater to toasty, odds are you toes are still kinda cold in our poorly insulated Roadster. As I was reading Engadget, came across this puppy on their CES reporting: Digitsole - The first connected insole: Click, warm and track! Insole warmer. Not sure how long it "lasts" but its charged by USB so maybe we can charge it while driving (probably not the safest way to go). Probably intended for winter sports people but hey, Roadster driving IS a sport.