puntodamar those methods no longer work, both dropbox and drive have done away with their features that allowed you to host games.
EDIT: although, I think people with older dropbox accounts are kind of "grandfathered-in" and can still do it. I'm not positive though.
EDIT (again): it seems it's possible drive added that feature back. I haven't tried it yet, but instructions at the end of this thread: