Basically I have TBs of data that I would like to keep mirrored on 2 seperate machines but I do not have TB's of webspace. If FTPbox could intelligently select which files need to be uploaded to keep both machines identical then this would reduce the necessary webspace vastly.
It would be awesome if FTPBbox had the ability to upload a hashtable containing a hash of each file on local. This would give the ability to only upload a file if it's different (or absent) on another client. It would also give the ability of tracking changes to local files without having FTPbox running permanently.