Continuing on your way, your idea is to share some documents to external openkm application, on your case a wiki.
We could study this case seems interesting, and setting a way to directly publish a download url, not a OpenKM one that needs login.
But for system integrity, we\'ll must add a new security grant called \"public\" that marks this document for downloading without login. This could be done without major problems with a url without security credential and allways testing that file demanded has public grant.
Other way is that on nearly future lease we\'ll mapping network resources, and sincronize them on OpenKM ( bidirectional ), then you could map on wiki network resource not OpenKM, but this, from by view point is a bad solution.
The main question, I think, is about security credentials. If it\'s a good idea to have some documents with public grants that not needs securiry login to download it.
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OpenKM Team ( be open my friend )
http://www.openkm.com