Zeiss’ Camera/Cine Lenses page says that they’re releasing new lenses for SLRs (see previous posts 1 and 2). After a few hints over the last few weeks, it now says, "The solution will be revealed on 01/18/06. Until then, you will find out a little more each week from our images.".
So far, they’ve said "ZF", so they’re likely in Nikon F mount, and there’s now a picture of a lens labeled "Planar 1.4/50".