Available in both Canon and Nikon mounts, the Tokina 24-70mm f/2.8 AT-X Pro FX lens is now available for pre-order at B&H, Adorama and Amazon. The price is $999 and shipping will start in August. Additional information on the new lens is available here.
Update: Tokina published new sample photos from their 24-70mm f/2.8 AT-X Pro FX lens.