Blogs

Marginal Revolution
The Art of Theory
Prospero Blog @ The Economist
Bleeding Heart Libertarians
Matt Ridley The Rational Optimist
Public Reason: A Blog for Political Philosphers
PEA Soup
Bloggingheads.tv
Will Wilkinson
Slate Moneybox by Matthew Yglesias
Cato Unbound
Cafe Hayek: Where Orders Emerge

News

Socratic News
Reason Magazine
Instapundit
Huffington Post

Organizations

Alexander Hamilton Society
Brown University, Dept. of Political Science 
Brown University, Dept. of Philosophy
Political Philosophy Workshop
Political Theory Project
Brookings Institute
AEI
Heritage Foundation
Center for American Progress 
Jack Miller Center
The Freedom Center, University of Arizona
American Political Science Association 
American Philosophical Association 
Liberty Fund
Institute for Humane Studies
Intercollegiate Studies Institute
The Federalist Society
Law and Economics Center, GMU
Manhattan Institute
Social Philosophy and Policy Center 
Students for Liberty 
The Alexander Hamilton Society
James Madison Program, Princeton 
Libertariansim.org
Ayn Rand Institute 
Mad River Glen