Even if you've never saved the file, some of the Office apps write temp files that would serve as a good starting place for recovery. They're invisible by default and I don't remember where they live under OSX, but you might be able to find one of those somehow. Sorry I can't be more helpful. I just remember from days past in OS9 when Word would choke and die that it left undeleted Word temp files scattered about my desktop adn they were frequently useful for recovering unsaved content..