d-portal.org, which is collecting and mapping data on foreign aid given by US and other countries. This article on FastCompany.com provides an introduction.
This is an exciting use of data and mapping.
I'd like to see someone build a tool that offers the same features, but maps cities throughout the US and shows aid to poverty neighborhoods. Click on the Philanthropy tag and see some sites I've pointed to who are beginning to do work mapping donations in the US.
Visit the Tutor/Mentor Institute wiki section on uses of maps. If you're interested in supporting our own goals, let's connect.