It's pure arrogance to think that only authors at an institution should be privileged to deposit OA papers. Freelance-scholars must have a disciplinary repository. I have collected links to such repositories and the editors of the OAD have accepted the list. Feel free to add more repositories at:
http://oad.simmons.edu/oadwiki/Disciplinary_repositories Some of these are not "Central Repositories" like Arxiv. Some are restricted on specific languages or regional provenance. These DR are without doubt important contributions to the OA community. We should support them. Klaus Graf