bnewcomer
recommended this
Philanthroper's an interesting combo of micro-lending + group buying. Each day a particular nonprofit is highlighted, and you can donate $1 to them -- but no more. (Except for later.) The idea is, lots of little donations add up -- and, esp. if you make it a habit, it simply becomes easier to give. I'm still a little skeptical, but I love the idea -- it remains to be seen how sticky it'll be.