P2P lending mite work, lenders apply directly (on-line) and lenders contribute to the pool...say someone wants to borrow 500 BTC, they state their case for needing the money and offer a interest rate and loan term etc, the 500BTC gets broken down into 20 blocks of 25BTC and investors spread there risk by only funding 1 or maybe 2 blocks per loan...over time the on-line loan app fills up with investors etc.