Access to Public documents for example is via the URL of a specific document - there is no browse capability . We have tightened up security on BeehiveOnline and sometimes the Public areas needs a tweak to get it operational - try using a document url and if that fails let me know the Workspace/folder and I can check the Access controls on the folder and set them accordingly.When you say "logged in user", does it mean an oracle employee, or can it be an OTN logged in user?
Is access to a wiki page (within the workspace) via a url possible? The idea is for them to view the diagram there and enter comments. Ideally to also access some document folders (perhaps via url's embedded into the wiki) and make updates to the documents.