Interesting arguments about public policy issues from a variety of academics:Crooked Timber
Less Wrong is a community blog devoted to refining the art of human rationality by focusing on various psychological insights into human biases:http://lesswrong.com/
A good source of reflective arguments about current events from researchers in four centres based at the Philosophy Faculty, University of Oxford:Practical Ethics
While referencing the book Predictably Irrational by the author Dan Ariely, it also includes many entertaining examples of unfortunate and sometimes fortunate human irrationality:http://www.predictablyirrational.com/