Juan Treminio has started up series of posts over on his blog looking at the Kohana framework and guiding you through the creation of a sample application with it (in-depth).
The Kohana Framework started off as a fork of the very popular CodeIgniter Framework. During the KO 2.x versions, it stayed fairly similar to how CodeIgniter functioned, and a developer could easily jump from one to the other and feel very familiar. With the introduction of the Kohana 3.x version, this all changed, as Kohana was completely rewritten from the ground up. Now, unless you're a seasoned PHP developer, you may have difficulty making the jump from other frameworks in Kohana. I have written this tutorial to be your step-by-step guide into the world of Kohana
So far, he's posted three parts of the series:
Keep an eye on his blog for more posts in this great series!