First, to the Moderator(s), if this is inappropriate, please feel free to move/ delete as you see fit.
I found a really cool little App for iPhone/Droid called "Charity Miles". It's a free App that tracks your mileage while walking, jogging, or cycling and, thru corporate sponsors, donates "X" amount of money to charity for every mile that you complete. It doesn't cost you anything and you don't have to hit your friends or family up for money. You just have to do what you already are doing anyway with the App turned on and the miles you accumulate not only help you, but they help someone else, too. I think there are about half a dozen charities on the App right now but that number will, hopefully grow.
This morning I rode 28 miles for the Fox Foundation to help in the battle to find a cure for Parkinson's Disease. It's a pretty neat thing.