Has anybody ever looked at this? Please also check out the comparison between the free and the institutional version here. Would be quite cool if we could get full-text versions of academic articles into Zotero that way (through Zotero - either through COinS or through the DOI...)
I'd be very surprised if this finds many OA PDFs that Zotero doesn't already get through unpaywall, though, so I don't think it'll add much on that end.
I'm not so sure - does anybody know? See here, for instance.