Excellent - thanks for sharing! It's a great model and I'm excited to see it grow.
Of course, the nice thing about Kiva is that it is a loan, rather than a donation, which allows you to use the same initial investment to help lots of people again and again.
Members of the Watsi team work for Kiva too (at least as of several months ago): http://news.ycombinator.com/item?id=4424745