Davey Shafik has a sad announcement for the community in this blog post</a. today - the end of development on his framework, Cerebral Cortex.
There are several reasons for this, I will go into them now: the introduction of the Zend Framework and a general lack of community surrounding the project.
Well, it had to come, so here it is, without further delay, hindrance or obstructions. I'm no longer going to be working on Cerebral Cortex.
Have no fears, though - the domain where it lives will still exist, and you'll still be able to grab it from there - there just won't be any new development.