PBS web video on micro-lending

Just heard about this on TV. Here is the link: http://www.pbs.org/now/shows/249/micro-lending.html. And here is a segment of the introduction to the story from the PBS web site: " How can a $20 loan completely change the life of a farmer in India? In this web-exclusive video, billionaire venture capitalist Vinod Khosla tells David Brancaccio how making tiny loans, a process called micro-lending or micro-credit, can make a tremendous difference to the lives of people in developing countries. " Sounds very interesting. Here's the link again.