For more information on the economics of free markets and the politics of liberty, visit the following sites.
The free online edition of Reason Magazine.
The Ludwig von Mises Institute is dedicated to advancing the scholarship of liberty in the tradition of the Austrian school. They have many articles from prominent economists such as Mises and Friedrich Hayek, as well as free online editions of several great books.
The Cato Institute is a libertarian think tank dedicated to the principles of individual liberty, limited government, free markets and peace.