It can be found here.
From Jeffrey Friedman:
Building on the success of our financial-crisis issue, which is being reviewed for republication as a book by Columbia University Press and the University of Pennsylvania Press, we have started a blog for the contributors to the issue. The “Causes of the Crisis” blog can be found at http://causesofthecrisis.blogspot.com/, and you are invited to participate in the discussion. In fact, you are the first people to be notified of the existence of the blog. Please spread the word!
Already Vernon Smith has posted there on the pretense of economists’ knowledge, David Colander has responded to Paul Krugman’s indictment of economics in last Sunday’s New York Times Magazine, and I’ve posted on the irrelevance of macroeconomics to understanding the crisis.
Friedman’s rebuttal to Richard Posner’s A Failure of Capitalism is here.