Chris,
First question is, what version of Koha are you running?
Sorry about that. We've been running 3.0.5, but we're actually setting up a computer with 3.2-alpha as I type this. I did not think to check if 3.2 had added any functionality for printing bibliographies.
The COinS support was designed to work with Zotero, and as far as I know does. (At least in the current master branch of the git repository)
The COinS support for MARC21 is very rudimentary (there's even a comment to that effect in Biblio::GetCOinSBiblio). The specific "itch" that we have at the American Numismatic Society is that it doesn't handle analytics (and why would it? not many libraries use analytics). Since analytics make up more than half of our database, that's a serious issue for us. It also doesn't deal specially with conference publications (008/29), a feature I think we'll probably add in while we're at it.
But like all software, everything can be improved, speaking as Release Manager for version 3.4 (the next version 3.2.0 is in feature freeze and near stable release) I do ask though that any improvements be sent as patches, so they can be included in Koha for the benefit of all :)
We will be happy to share our improvements with the community. Regards, Jared Camins-Esakov -- Jared Camins-Esakov Cataloger - American Numismatic Society 75 Varick Street, 11th Floor New York, NY 10013 Tel: (212) 571-4470, ext. 171 camins@numismatics.org http://www.numismatics.org/Library/Library