I am definitely a bit late for this conversation, but I am more interested in addressing the confusion between DMS and ECM that people are having!. We put together an article displaying the differences...however is this geared more towards the management of converted documents (rather than those who have always been electronic). - http://www.nedocs.com/blog/dms-vs-ecm
Additionally, what kind of privacy protection can/does OWL provide? Perhaps it is an ideal fit for something like Moodle...but what about an organization looking to pick up a strong DMS?