On the NETTUTS.com site today there's a new (quite comprehensive) article focusing in on the Kohana framework:

Kohana is a PHP 5 framework that uses the Model View Controller (MVC) architectural pattern. There are several reasons why you should choose Kohana but the main ones are security, weightlessness and simplicity. In this tutorial, I'll introduce its main features, and, with a simple demonstration, I'll show you how much time Kohana can potentially save you.

The article covers everything from the download and install out to creating a simple project - a CD collection manager with a MySQL backend. Complete code (including a bit of CSS) is provided for you copy and paste pleasure.