I've been working on various files, components saved to file to model then to reload, and various LayOut files in Dropbox.
Needless to say with multiple people using files, and downloading versions to work on each computer, it's getting crazy just to think about it and for sanity it seems I need to work all on Dropbox versions (while saving copies everywhere else). So far that works, but I haven't had anyone else try to use these files and test their linkages at other sites.