Microlending and Kiva, the theory behind it
Kiva takes the micro-lending idea and combines it with the democratizing power of the internet to allow you (or me, or the guy reading this over your shoulder) to connect with entrepreneurs in the third world and give them a loan. You can search Kiva's website to find a businessman or woman that you want to support, and, as time goes by, you can see the impact that your loan has made on your business partner's life. Your $25 might do more than buy food for a week. It could supply someone with a lifelong profession.