A lucid and rather sympathetic exposition of Austrian (Hayekian) economics by J. Bradford DeLong, an admitted non-believer (see second paragraph under IV.B).
Related posts:
Liberty and Its Prerequisites (scroll down to "The Evolution of Libertarian Thought: The Unification of Economic and Personal Liberty")
More Hayek
See also: F.A. Hayek Articles & Books, Etc. (links)