Update on Arab Revolutions

Obama calls on Gaddafi to step down in Libya, okays use of sanctions. It is obvious that any moral standing Gaddafi had is long gone, but will sanctions and harsh rhetoric really accomplish anything? At what point do his actions against his own people warrent direct action by the UN Security Council? Ideally, Obama can get desired results without using force in this growing North Africa/Mid-East unrest. Saudi Arabia will remain the tipping point however, I believe. If there is an uprising in the heart of the Arab Kingdom like we have seen elsewhere in that part of the world, it will no longer be a tenable choice for the rest of the world to sit on the sidelines.