Here are the blogs I'd start with: For behavioral and general economics, my two favorites are Tyler Cowen and The Big Picture

http://www.marginalrevolution.com/

http://bigpicture.typepad.com/

For Development/Macroeconomics two great ones (besides Becker/Posner) are Greg Mankiw & Danny Rodrik

http://gregmankiw.blogspot.com/

http://rodrik.typepad.com/

Mankiw is a bit more traditional than Rodrik, so they tend to have some great back & forth, and when the discussion jumps above college-level they tend to link/explain things. </econ nerd>

Thanks for the suggestions. I see Big Picture just moved to a new URL.

http://www.ritholtz.com/blog/