I've been doing this for about a year. My stats:

Total loans: 230
Total lent: $6,550.00
Total lost: $0.18
Amount of currency loss: $0.18

For those keeping score, that works out to ~$28.47 lent per loan, $0.000027 per dollar lost. The $0.18 total lost is due to currency losses.

I use KivaLens.org to find my loans. My filters are Risk Ratings: 3* to max, Default rate: min-0.3 percent. The majority of my loans end up going to Peru & Philippines. Nothing intentional about those countries, rather their organizations keep defaults low and currencies stable enough that I know I'm going to get a decent amount back. Sadly, I avoid the US loans as their batting averages are quite low. Keep in mind that credit in the USA is handed out like candy, so if someone's not able to obtain credit via traditional means in the USA, something's up.

I'm not sure where else you can pick up 32,000 UR points for $0.18.