Ross and I submitted a comment on Mann et al 2008 on Dec 8, 2008 within the 3 month time period for comments permitted by PNAS. The comment, pursuant to PNAS rules, was less than 250 words and had 5 (or less) references (one of which was Mann et al 2008 itself). The 250-word limit doesn’t enable one to say a whole lot. However, one advantage of this is that PNAS has a more active comment section than some journals.
While PNAS has pretty liberal rules on pre-prints being available, I’m not going to press the point and am not going to post it up right now.
Thanks to UC, Jean S and Hu McC, all of whom commented on drafts of the Comment.
As a little game, readers might be interested in trying to guess the other 4 references. One should be very easy; two more should be guessable by alert readers; it will be hard to get all four.