I would love to solve this problem. I've commented before about the limitations of current file system management (e.g. top comment on http://www.woobius.com/scribbles/posts/0007-document-control...), and I've worked out most of the UI and algorithmic structure for a replacement system.

Soon. Real soon now, I'll get sick enough of dealing with file "management" systems, and this will start to roll out.