Not sure if this is the one Myq was referring to or not, but here is a site that gives the details on how money is handled at charities so you can determine which ones are best for your donations.
http://www.charitynavigator.org/
oh, and here's a link to their profile on The Fistula Foundation
http://www.charitynavigator.org/index.cfm?bay=search.summary&orgid=8855