The previously rumored Samyang AF 14mm f/2.8 EF full frame DSLR autofocus lens for Canon mount is now officially announced. The US price is $849, in Europe the lens will be €699. Still no word on a Nikon version of the lens.
In the US the lens is available under the Rokinon brand and you can already pre-order one here (shipping starts in February).
Technical specifications, MTF chart and lens design: