The US price of the Tokina AT-X 11-20mm f/2.8 PRO DX lens (Aspherical, IF, APS-C) was officially announced today – B&H just listed the lens as available for pre-order at $599.
Shipping will start on March 2, 2015. Additional information on the Tokina AT-X 11-20mm f/2.8 PRO DX lens can be found here, some sample images are available here.