Wired's editor-in-chief Chris Anderson is working on a new book, to be published next year, about the idea of "free" in the old and new economies. Wired is running a long excerpt from the book and some sidebars about the economics of giving away, e.g., CDs and directory assistance. Techdirt has a few quibbles about Anderson's ideas — mostly areas in which he may be shading the argument to sell more books — but mostly buys that the equations of economics continue to work when zeros are plugged in in judicious places.