Congratulations to the OpenDOAR and the crew at Sherpa for exceeding 2,000 repositories listed!
This is particularly significant because OpenDOAR is a vetted list. As described on the OpenDOAR website, OpenDOAR provides a comprehensive, authoritative and quality checked list of institutional and subject-based repositories. In addition it encompasses archives set up by funding agencies like the National Institutes for Health in the USA and the Wellcome Trust in the UK and Europe.
This post forms part of the Dramatic Growth of Open Access Series.
Thanks to Peter Suber via the Open Access Tracking Project.