UPDATE 2 (10:34 pm): Live streaming from the main group of activists.
Police are moving to clear Occupy San Francisco. The remaining activists are organizing for resistance (below, recorded earlier). Leaders are encouraging non-violence, and asking for volunteers to be arrested.
Meanwhile, Occupy activists across the country are tuning in online to a mass General Assembly in Oakland, where activists have torn down a police fence and are voting on a call for a “General Strike” on November 2.
Police intend to impose a curfew at 10 pm Pacific Daylight Time.