Members of our team work for Kiva and Vittana (and I worked in microfinance for 4 years) and we would love to eventually try and offer a healthcare loan product (or at least encourage patients to open savings accounts). That said, there are lots of things that make this a tough market (e.g. people don't plan to get sick like they plan to start a business, cost of treatment can be more than they could ever repay, etc.). In all honesty, we can't even figure out healthcare in the US, and it's twice as hard in countries like Ethiopia.
Thanks for the feedback. We love it!