oh wow, I've missed a few things in here in last two days

Ok, I don't want to argue if Ripple is a scam or not. I don't like Ripple because of some core assumptions in it's concept, but that has nothing to do with my concept.

So, yes, Ripple assumes trading of IOUs between random people via gateways or directly. In this narrow meaning it's completely same as bitcoin - it allows trading certain rather virtual tokens of value between entities via a public ledger and without any trust between the parties.

This has nothing to do with microlending.
Microlending is when a set of lenders gives money to a set of borrowers, and
a) each lender gives his money to multiple borrowers at once, spreading risks between as many borrowers as he can reach
b) the amounts lent are rather small and have a strict upper cap, keeping it apart from classic banking system
c) interest on the loans is paid
d) the system is not trustless, and there is no trust by default, trust between borrower and lender has to be established via due diligence

Ripple has nothing like that because
a) there is no risk attached (at least explicitly), so there is no need to spread it
b) there are no caps on the amounts exchanged
c) there is no interest involved
d) system is trustless, as the XPR exchange is maintained via trustless cryptosystem, and the XPR-fiat exchange happens offline and in person between exchange and gateway and there is no prerequisite trust needed between them to operate.

My concept is about replacing formal due diligence with something else, not about a system to exchange IOUs. These are just completely different things.