When you read this BusinessWeek article, make sure you also watch the 9 minute video featuring Mr. Paul Polak, co-founder of International Development Enterprises (IDE). Reading the article, I noticed, for example, that the Bill & Melinda Gates Foundation supports IDE.
Another initiative that works on fighting global poverty is www.myc4.com. In fact, they want to end poverty by 2015. You can get involved by investing 5 Euros. Join MyC4 yourself by clicking here