Donate while running/walking/biking

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I just found out about the most amazing app for Droid and iPhones. It's Charity Miles. For every mile you walk, run, or bike, $0.25 ($0.10 for biking) is donated to a charity of your choice. They have great charities you can pick from. Don't worry about not have money to donate, you're sponsored by companies that work w/ Charity Miles, so nothing comes out of your checkbook. Today, I donated 3.5 miles to the Michael J Fox Parkinson's foundation. I've been running to get myself healthy, now I run to also help out others, like my Grandpa. It's a free app, and I highly recommend everyone to try it! The only downfall is it calculates your miles via GPS, so it doesn't work on treadmills. :-(