We did Race for the Cure this weekend, (although in my case it was more "Leasurely Stroll for the Cure"). I will get up at the butt crack of dawn when it is less than 40 degrees (it was still dark outside! And really cold!), but I draw the line at running. Cold and early fulfills my quota of charitable hardships without having to resort to physical activity.
I did get a doughnut and hot chocolate for my troubles though, so I'll be back to do it again next year.