Beg, Borrow, and Steal
Joel Maske, the guy behind iSyndicate and old-school online financial shop Galt (back in the day, mutual funds paid him big money to set up brochureware sites in his mutual fund mall--before they realized they could set up their own sites), is back, this time with a C2C lending/rental play called Moogul.
Basically, it's eBay, but for borrowers. I like the concept (after all, who doesn't want free stuff), but I worry about the trust issues. What happens the first time somebody breaks something?
I think that a better idea is to set up sharing groups with your friends. I know that I would love to have a service of this kind, since many of my DVDs are still floating around out there!
You could also cross Moogul with a social networking play and really give it a kickstart.