Mediachest is attracting interest. MetaFilter calls it 'actually useful social-software' ('a sharing community for books, DVDs, and CDs. You can borrow your friends books and music and movies, and they can borrow yours.').
Boing Boing has a post from Michael Edwards (one of the team which developed Mediachest), part of which runs, 'Mediachest is a social software site that allows users to inventory their collection of physical media items and search the collections of their friends and friends-of-friends for items such as DVDs or books that they would like to borrow.
The site facilitates the borrowing and loaning of these items in a similar way to how EBay facilitates online auctions %u2014 there are user profiles, feedback pages, and rankings. In addition to searching the collections of friends you are able to see the items of people that are geographically close to you, or that are members of groups that you associate with (such as a student organization, gym, or work place group).'
David also points to The Aula Point of View "which has a particularly striking post by Jyri Engestrm":
As the cost of publishing the things you have and the things you want decreases linearly, the volume of non-monetary exchange (lending, sharing, donating things) will increase exponentially. ... In the coming years, blogging the products you own will be further simplified when barcode- and RFID-readers become embedded in cheap everyday handheld devices such as cell phones. I believe the resulting change in social behavior will not be just quantitative ... The shift to a blog-driven Web can set in motion a new, lively circulation of pre-owned products among networks of friends who play with the dynamics of social capital, not financial capital. Where Amazon pioneered the Web%u2019s retail layer, and eBay pioneered the bargaining layer, a service like Mediachest could pioneer a new lending layer in product circulation. ... Some distinct characteristics of the emerging online lending layer: First, it is about retail products, but unlike Amazon, it is not about retail transactions. Rather, it%u2019s about recycling, swapping, donating and borrowing (mostly) pre-owned products. Second, it%u2019s about moving material goods, but unlike eBay, it doesn%u2019t require national or global logistics. It%u2019s about very local logistics %u2014 not the suburban neighborhoods as much as the trust-based interpersonal networks that inhabit every institution in our society: the workplace, the school, the sports team, the hospital, the university dorm. And third, it may not be about PC users as much as it is about mobile users (although that is contingent on the trend of more hackable mobile terminals). And finally, the emerging online small worlds oriented around non-money-based circulation of material objects might not at first reach many of the more affluent 30 to 40-somethings. But they are much more likely to reach their kids, or be originated by them.