for anyone that has an interest in microfinance/micro financial services, sustainable energy, community based development, green building, water/sanitation infrastructure innovation, then check out what Jamii Bora has been doing. i mention them b/c they are amazingly innovative and tech-savvy.
http://www.JamiiBora.org
to demonstrate that, they recently had a ”tweet-up” through a fund-raising event. example of viral marketing used for philanthropic efforts.
http://www.race4change.org/