Andy Tattersall has published "Comment, Discuss, Review: An Essential Guide to Post-Publication Review Sites" in LSE Impact of Social Sciences.
Here's an excerpt:
The debate on whether which is the best way forward for post-publication review will continue and like other topics such as measurement of research, there appears to be no 'silver bullet'. Instead there is a collection of sites and tools operating in silos, all offering to solve a problem, that being the lack of post publication discussion and assessment. Below are a list of some of the main tools and sites offering some kind of comment, discussion or review system—it is not exhaustive or comprehensive, but it will give you some idea as to what they are and do.
Digital Scholarship | "A Quarter-Century as an Open Access Publisher"
