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.