I don't understand why a paraguayan store owner would need $1075 to stock her store (http://www.kiva.org/app.php?page=businesses&action=about...), but it certainly seems like these kinds of investments are kick-starting entrepreneurial activity in places where it was traditionally impossible or exceedingly difficult.
I think Kiva is my favorite new business because it truly does raise the social welfare of the world while also being a startup.