Good examples?

[eluser]copernicus[/eluser]
I've been in the process of learning Codeigniter and have gone through a lot of tutorials that I have found online. The problem is, most tutorials deal with small things like creating a small blog or focusing on one tiny aspect of a web application. Are there any tutorials that are more in-depth like the Symphony one where they created an entire website over the course of a month or any place to view the source code of a large web application?