Dropbox it's ok, but what I'd really love is a software which does something a bit different: to arrange all the unused space in the hard disks of a LAN as a bi

Dropbox it's ok, but what I'd really love is a software which does something a bit different: to arrange all the unused space in the hard disks of a LAN as a big virtual folder, with redundancy and all. Every time I think of the Outlook-and-Word users I have at the office with 500Gb hard disks...