My wife ran a Time-based currency market in Madrid 6 years ago, it even got the attention of the press. It's a slightly different model from LETS since time is

My wife ran a Time-based currency market in Madrid 6 years ago, it even got the attention of the press. It's a slightly different model from LETS since time is the currency and different tasks are, therefore, all valued the same. I was the one to install and maintain the software behind it (called Cyclos, project.cyclos.org). I'm glad someone can turn that into a business, people really love to get help from others and/or offer their own services. Although my feeling is that there's considerable churn in both supply and demand.