Not really. Somebody actually pointed me about the similarity, but I don't see where this analogy is coming from. Ripple is a network of exchange gateways and an internal currency called "ripples". My thing is mainly about creating a trust network of actual and potential borrowers based on their personal relationships and offline agreements.
I don't really see much similarity, can you explain your point please?

------
Yes, I know about IOUs exchanged between the gateways and users, but that has nothing to do with microlending, it's just a mean of payments and exchanges. My thing is about exactly microlending, so it's a different application, and the only similarity as for me as that both are money-related services.