Here is the experiment we launched a few months ago.  delighted to simply turn this into Plos Currents though.

Scroll down for the editorial on the ‘review games’ and the impetus for this endeavor.

I do find these useful and stimulating – movescount.

I just saw this, interesting. Many journals/societies are discussing the enhancements they provide in addition to the papers themselves. Discussion etc. in the form of blogs about the papers, but hosted by the journal directly is compelling. No reason that libraries could not also get into this and be the place for online academic discussion, or at least a particular subset thereof.