WebReference.com has the second part of their CakePHP introductory series posted, this time focusing on the actions in the controllers.
They talk (briefly) about how the call to the page is passed off to the controller's action and how you can get more information into it via POSTed values.
There's also a look at redirection, from action to action in a controller (or even to another one) and a look at a very handy method of sharing functions between the child controllers - a "master" parent controller (in their case, AppController).
At the end, they throw in a bit about components - module and reusable bits of functionality that can be passed around from controller to controller, action to action.
This series of articles are excerpts from the Packt book CakePHP Application Development.