Six new contributions to Nature 's online debate about open peer review are published today.

Systems: Online frontiers of the peer-reviewed literature

Theodora Bloom

Perspective: The case for group review

Debomoy Lahiri

Perspective: Peer review of interdisciplinary scientific papers

Christopher Lee

Quality and value: The true purpose of peer review

Charles Jennings

Quality and value: Models of quality control for scientific research

Tom Jefferson

Ethics: Trust and reputation on the web

William Arms

All articles are available at:

http://www.nature.com/nature/peerreview/debate/index.html

Readers are invited to join the debate in Nature's peer-review comments blog at:

http://blogs.nature.com/nature/peerreview/debate/comments