As I don't have much time to blog today, I'll just do another link post.

There are a number of different opinions in economics about public policy/research (a point which can be lost in undergraduate level classes). To avoid bias, it is often useful to check what persons of various  persuasions say on a given topic, then weigh each of their arguments yourself. To that end, here's a list of some of the blogs/sites which I've found useful in avoiding groupthink (at least wrt debates in economics).

Note: These categories, as with most labels,  are approximations of truth, and tend to gloss over important differences. For instance, libertarians/austrians get mixed up the with center-right. Should be taken with a large grain of salt.

"Left"
http://economistsview.typepad.com/economistsview/
http://delong.typepad.com/sdj/
http://thinkprogress.org/yglesias/issue/
http://www.washingtonpost.com/blogs/ezra-klein

"Center"
http://blogs.ft.com/economistsforum
http://www.economist.com/node/21003975/index.xml
http://www.nber.org/new.html
http://theincidentaleconomist.com/wordpress
http://modeledbehavior.com
http://chrisblattman.com

"Right"
http://gregmankiw.blogspot.com/
http://marginalrevolution.com
http://www.becker-posner-blog.com/