I met Hans Rosling almost two years ago at Leweb Conference in Paris. While his presentations are really jaw-breaking I admire him for two facts:
1. The way he presents statistics (the software is available atÂ http://www.gapminder.org and also as a google gadget).
2. His deep belief that world can go out of poverty through technology.
You can find more about Hans Rosling atÂ http://www.ted.com/index.php/speakers/hans_rosling.html.