There is a really cool site called ww.kiva.org where you can give a $25 loan to a poor person in the world over the internet. A Kiva partner then pools your loans with other people’s loans, and they supply capital to the enteupeneur to buy a sewing machine, or soda pop, some pigs, or whatever.
As the loan gets repaid, you get the money back. You can have them put it in your paypal account or you can loan it to somebody else so your $25 can help a bunch of people over and over again.
One of their partners is an affiliate of World Vision. It is called VFC and it was instrumental in rebuilding Rwanda after the 1994 genocide. VFC is now offering microloans to people in Rwanda! Right now, there is a bunch of them:
Currently, a KIVA microloan is filled within hours, so there might not be anyone to invest in when you check this link, but there should be other loan activities going on! I would encourage diversification among countries and finance agencies, because sometimes bad things happens and they default (like they did in Kenya).