Well, the very short form explanation is that nobody on the project except Ohad believes either that there is any problem with the originally planned design, or that his new plan is even suitable to construct a "useful" tau.  During discussion of our concerns, Ohad "went off" on the most active developer (stoopkid) and kicked him off of the project.  Every other member of the "team" (including myself) then basically stopped development and effectively left the project.  This means that Ohad has now effectively lost his second team entirely, and is once again on his project alone.

To my knowledge, in the time (months) since, no new development has occurred.

I still keep my commitment to Ohad to attempt to verify any implementation which he brings forward.

I'm also still happy to explain the original design premise to anyone who would like to know about it.