IDEO: Design for Social Impact
IDEO has been working with the Rockefeller Foundation to bring more of the design community into the social sector. They just released a manual on how to do this, called Design for Social Impact, which is freely available on the web.
When cutting edge, well-respected and innovative firms like IDEO take the plunge, it makes talking about (and doing something about) global social issues more acceptable to the wider design and tech business communities. Hope to see more groups following suit!