It is apparently official: Hezbollah units have, within the past few minutes (11:21 AM EDT Sunday), all begun raising the Red Flag of War. This is taking place over such a widespread area, and at the same time, as to logically be "official."
Given Israeli bombings all across Lebanon for the past three days, and the deliberate detonation of pocket pagers, cell phones, and walkie-talkies in the days prior to that, it has been clear to most observers that war has already been foist upon them. This gesture, with the Red Flags, is apparently acknowledgement of what has been obvious to most people, for days.
Where things go from here seems obvious too: Down hill. Fast.