Directory for Skepticism, Free Thought from Free-Market. Lots of content by and about people like Charles Murray, Thomas Sowell, Dinesh D'Souza, and Camille Paglia. Sounds good and it is. Group inquires into free-market and libertarian ideas as well. Check out their calendar.
Site also points out current examples of propaganda and offers a Web forum.
Guaranteed to teach you at least one thing you thought you knew. Named Freedom Home Page of the Week. Penn's a libertarian and both are skeptics to the bone. An e-zine featuring skeptical articles on pseudoscience, and libertarian philosophy and politics. It's a quick download, available for several platforms.