From a borrower standpoint I can see some sort of "line of credit" product being attractive, whether a consumer credit card or a business credit line, etc. But I have a hard time picturing how to fractionalize it from a lender standpoint....you can't have several people all willing to loan someone money on a moment's notice. Unless hundreds of lines of credit are aggregated into a fund with institutional ownership. I can't see that being something us little guys can invest in.