This week is one of my personal favorites-- Kiva.
YOU choose who (and which sector of business) you want to contribute to. The site will tell you about the person, about the business, why they need a loan (how will your money be spent), and how many additional loans they need to make their goal. This is the first group I gave to. My loan was paid back in 6 months (you can see how long the group has to pay back your investment).
It is a fantastic way to give back!
http://www.kiva.com to learn more and to start your donation chain!