I purchased recently the Zeiss 35mm lens with an M-mount for my Zeiss Ikon camera. It's very impressive. I'd like to get one for my Canon 5D, MII, as well. Of course, it will have a heft price: €1385.
For those who haven't seen it, here's the press release for the Distagon T* 1.4/35mm for Canon EOS and Nikon: