I just got back from The Field‘s presentation of its ERPA projects, A Public Display of Invention. Very interesting stuff and a wide range of ideas. Of all the projects, though, I was particularly intrigued by this new barter site for artists called OurGoods.org. According to the site:

OurGoods is a peer-to-peer online network that facilitates the barter of goods and services between artists. The site matches barter partners, provides accountability tools, and offers technical assistance resources to help artists complete their barters and their projects successfully.

It is currently in beta, so log on and help populate it. I think it could be a really useful thing.