The IoP have a free peer-reviewed online journal called "Computational
Science & Discovery" it is aimed at papers describing the development of
computational methods and/or the application of computing to scientific
problems no matter what the discipline.
This seems like the kind of place GridPP/related work could be published?
GridPP Dissemination Officer
Queen Mary, University of London
School of Physics
Mile End Road
London E1 4NS, UK
E-mail: [log in to unmask]