Start Your Own Currency - "In the Catalonia region of Spain, a restaurant and a community garden are part of an experiment in alternative cash--they are accepting a home-grown currency called the Eco as well as the Euro." [viz. gated article (Google link), cf. The Wörgl Experiment]
The Birth of Sharing Law and the Rise of Co-ops - "A new sharing economy is emerging — but how does it fit within our legal system? Time for a whole new field of cooperation law." (via wc)
Newsflash: actually useful social-software site. There are many, many (etc., etc.,) sites that have sprung up to represent networks of friends (and friends of friends) on the web. But so what? There's no compelling reason to create or keep these profiles; there's nothing in it for you (just lots of work). But I've stumbled across Mediachest (screenshot) which is a sharing community for books, DVDs, and CDs. You can borrow your friends books and music and movies, and they can borrow yours. It's like a permanent MefiSwap!