B&H has the new Zeiss 135mm f/2 Apo Sonnar T* ZE lens in stock and shipping for Canon EF mount. Check it out here at B&H Photo.
The Nikon ZF.2 version is not yet shipping; however, it is available for pre-order.
Carl Zeiss Apo Sonnar T* 135 f/2 Lens Announced
Carl Zeiss will be showing off the new Apo Sonnar T* 2/135 lens at Photokina 2012. The new lens will be available for Canon and Nikon mounts in the ZE and ZF.2 series, respectively.
[youtube http://www.youtube.com/watch?v=qFMhilBU7BU&w=640&h=360]The new Zeiss lens should be available in December 2012 for around $2000.