Over the past few years, FRONTLINE/World has produced a number of stories about social entrepreneurs, all of which you can watch online.
On Monday, June 25th, they are going to hold an awesome-looking film festival, Heroes from a Small Planet, in San Francisco from 6-10 PM at the Delancey Street Screening Room. Not only will they be showing the films, but they will have also have panels with some of the shows' reporters and social entrepreneurs like Trevor Field, co-founder of PlayPumps International (water pumps powered by children's play), Luis Szaran, founder of Sonidos de la Tierra (they use music in their work with impoverished children), Matt Flannery, co-founder of Kiva (they allow regular people like you and me to make microloans online), Stacey Warner, Program Director of Room to Read (they build libraries in the "emerging" world), and Bart Weetjens, co-founder of APOPO (they use rats to find landmines).
The APOPO or "Hero Rat" story is the subject of FRONTLINE/World's June 26th episode. I REALLY don't like rats, but it sounds like a story well worth watching--everything has its purpose, right? You can watch a preview here.
Full disclosure: My friend David Ritsher works for FRONTLINE/World.