Interestingly, "quasi-monetarist" Scott Sumner approvingly links to a good bloggingheads discussion with Dean Baker and Brink Lindsey.

Krugman blogs about monetary policy here, here, and here.

Sumner responds here.

Nick Rowe responds here. It's just hard for me to take Sumner seriously given that he believes that the American Jobs Act legislation Obama just presented to Congress isn't worthwhile.