Sympoze is attempting to use crowd sourcing to referee academic publications. The accepted papers will be published under an open access model for wider availability. From their website:

Sympoze will also offer…

• High-quality peer-reviewed scholarship by experts in the field
• Immediate open-access publication (for pieces that pass the review process)
• Yearly print volumes for each discipline in traditional book and e-book formats

See their website here for information on how to submit articles and become a referee.