I think you can already do this. Try browsing around to fonts:/// in nautilus and tell me if that satisfies what you were looking for.
** Changed in: meta-gnome2 (Ubuntu) Status: Unconfirmed => Needs Info -- Gnome offers no way to manage fonts https://launchpad.net/bugs/66833 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs