ImportError: No module named pycbf
which would mean you need to get an up-to-date build of cctbx - sorry. I have started to use pycbf (clearly) and I had not thought to mention it as no released versions include this dependency. I neglected to think that some people use the svn...
http://cctbx.sf.net is where to get an updated build from! These now include cbflib and pycbf which will give added awesomeness in the future.