That optional hidable toolbar would be great and somewhat a necessity for file handling on such a small screen. I am with you on not cluttering the view more than it already is. I would like it even less cluttery but that would mean menus.. which you didn't like
Also how hard would it be to incorporate some SSH support/handling. I don't think there is a SSH gui on the n900 yet. Together with bookmark handling it could become very usable.