Nature Open Peer Review trial

Our online trial opens up a parallel track of peer review for submitted papers for authors willing to go down that route. The traditional process will still be applied to all submissions selected for peer review. But we will also offer to post the submitted manuscript onto an open website. Anyone can then respond to it by posting online comments, provided they are willing to sign them. Once Nature's editors have received all the comments from their solicited confidential reviewers, the open website will cease to take comments, and all the opinions will be considered by the editors as well as the authors.

http://www.nature.com/nature/journal/v441/n7094/full/441668a.html