No, it's still there, on the branch mast/multi-cpu. Here's a direct link:

http://pike-git.lysator.liu.se/gitweb.cgi?p=pikex.git;a=blob;f=multi-cpu.txt...

Feedback is most welcome. :)

Right now the biggest hurdle is the lack of TLS support on OSX. I really hope Apple gets their act together soon.