Looks like it's back up; presumably, Lendle fixed whatever aspects of its site relied on Amazon's API.

Amazon adopted the lending feature, but it's not like they wanted people to USE it. Or at least not most of 'em. Apparently, they didn't expect people to use their online social networks to find other people to share books with.

Because sharing books is such an alien concept; who would ever expect it to happen in social settings? Or to set up a meeting place for book exchanges?