I would like to preface by saying I guess there is no real tangible problem, but I feel odd not having some system managing these things.
We currently have a large amount of XML files located in hierarchy of directories. I think it could be useful to use some Document Oriented DB around these folders. It could be extremely useful for searching purposes, but currently we have no need for search.
I am struggling to think of actual business reasons to even have a database currently. It could provide us an opportunity to "speed up our system" but I doubt scalability would ever be an issue.
Is there anything else that I have not considered?