Here's an excerpt from the "Introduction":
The Repository Interface for Overlaid Journal Archives (RIOJA) project (http://www.ucl.ac.uk/ls/rioja) is an international partnership of members of academic staff, librarians and technologists from UCL (University College London), the University of Cambridge, the University of Glasgow, Imperial College London and Cornell University. It aims to address some of the issues around the development and implementation of a new publishing model, that of the overlay journal – defined, for the purposes of the project, as a quality-assured journal whose content is deposited to and resides in one or more open access repositories. The project is funded by the Joint Information Systems Committee (JISC, http://www.jisc.ac.uk/) and runs from April 2007 to June 2008.
The RIOJA project will create an interoperability toolkit to enable the overlay of certification onto papers housed in subject repositories. The intention is that the tool will be generic, helping any repository to realise its potential to act as a more complete scholarly resource. The project will also create a demonstrator overlay journal, using the arXiv repository and OJS software, with interaction between the two facilitated by the RIOJA toolkit.
To inform and shape the project, a survey of Astrophysics and Cosmology researchers has been conducted. The findings from that survey form the basis of this report.
The project team will also undertake formal and informal discussion with publishers and with academic and managing members of editorial boards. The survey and supplementary discussions will help to ensure that the RIOJA outputs address the needs and expectations of the research community. Finally, the overall long-term sustainability of a repository-overlay journal will be assessed. The project will examine the costs of adding peer review to arXiv deposits, of implementing and maintaining the functionality which the survey shows to be most valued by researchers, and of providing long-term preservation of content, and will aim to identify and appraise possible cost-recovery business models.