Personally I'm thinking about the whole information fragmentation quite a a bit lately.
What if we move those few pages like http://cakephp.org/development into the book?
That way the book could become not only the real one stop for information but also those pages become ediatable through GitHub and the book becomes more self-containing.

When done, pages like http://cakephp.org/development just link to the appropriate page in the book.

I'm always thinking of the Cookbook as if it was printed and handed out. Wouldn't it be great if you would have the holy bible of CakePHP info in your hand?