I'm on there. Have 'earned' almost $100 for the Breast Cancer fund, and just like them for logging miles.

They have challenges every once in a while - I've gotten socks, seatpost bag, more socks, and I'm working for a beanie cap.

I'm very impressed with this organization - whenever I have a problem with software, they're quick to respond and really help work towards a solution. Nice folks, and a great way to give back.