It would be nice to be able to switch between "allow offline access" and "online only" on the command line instead of using the mouse. For example, "% dropbox -offline_accsess true file1,file2,file3...", "% dropbox -offline_accsess false file1,file2,file3..."
Once this is done, it is possible to treat files from the application in much the same way as if they were stored locally, while saving disk space by making them "online only".