The cover article in the March 08 issue of Wired details editor Chris Anderson‘s point of view on the emerging free economy. Much of this we've covered in the pages of PSFK before but if you haven't quite caught up, do print it out and read it on a train ride sometime. Anderson has done the rest of us a favor by giving us a quick breakdown on the categories of the priceless economy. He says that the opportunities to adopt a free business model of some sort have never been greater. But which one? Here's his six broad categories:

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