Dr. Krugman attracts some interesting commenters, although they agree with him too much, IMO.
Professor Mankiw's blog loses a lot of useful content by not doing the same.
As one commenter in the thread points out (Athene?) different economists are not discussing and debating their ideas enough, particularly in public media, with regard to the stimulus. Why is Dr. Krugman debating Sam Donaldson instead of Prof. Mankiw? And why is Prof. Mankiw sitting in a corner by himself, putting up blog posts with closed comments?
You're killing us.