It's fun and it has a significant impact on people, and ultimately costs me nothing!
I now work at Kiva!
Use KivaLens for Live Filtering (immediately see the impact of your selections), search by a combination of last payment date, group size, currency exchange protection, partner rating/delinq/profitability/portfolio-yield, exclude pilots, exclude religious/secular and use keywords for sector/activity/partner/country/use/description.
View the long descriptions in 30 languages and analyze your portfolio and display pie charts of how diversified you are across country, sector, currency loss protection, non-payment liability, auto-balance your portfolio across countries/sectors/activities and create email alerts and RSS feeds for your favorite types of searches. Enjoy!