It would be nice if that were added as an option to allow the title bar to change. Anytime you open a remote file with Transmit, Cyberduck or Forklift you only get the local temp folder location. If you allow the title to be set I know for sure Transmit and Cyberduck will set it to the remote server path/file name.
Other popular text editors allow this behavior. BBEdit, Textmate, Smultron to name a few.
If you have to work a lot with remote server files this would be a really big help.