This new post from Jon Lebensold (on the KillerPHP blog) introduces you to a handy feature of the Zend Framework - View Helpers.

In summary, View Helpers are great for encapsulating forms, grids and other functionality that could eventually be bound to a different data source or even be pushed back to the user through a simple AJAX call.

Example code on how to use them is included showing a sample helper that adds Ajax functionality to a form's submit and pushes the response values back out into a div on the page.