Peer-to-peer lenders, Prosper and Lending Club, are building a new marketplace for borrowers and investors. In this segment of The Motley Fool's financials-focused show, Where the Money Is, banking analysts Matt Koppenheffer and David Hanson discuss the pros and cons of investing in peer-to-peer loans, the costs associated with it, and what it would take for them to put their money behind the concept.