PEER – Final report on the provision of usage data and manuscript deposit procedures for publishers and repository managers is now available. "PEER is a pioneering collaboration between publishers, repositories and the research community, which aims to investigate the effects of the large-scale, systematic depositing of authors’ final peer-reviewed manuscripts (so called Green Open Access) on user access, author visibility, journal viability and the broader European research environment. The project will run until 2011, during which time over 50,000 European stage-2 (accepted) manuscripts from over 240 journals will become available for archiving"
http://www.peerproject.eu/reports/