Random thought I HAVE to share. Wouldn't it be awesome, if like in those V8 commercials where everyone has the little number above their heads for the servings of veggies/fruits when you ran you had the same thing above your head?!?! but for miles?! That would be awesome, talk about possible guilting into running more.
You see some guy with a big 10 over his head, and you'res says "3". I would be ashamed.