The collection of video tutorials on the wonderful php framework. There are screencasts for beginners at all, and for those who are familiar with the framework

CodeIgniter From Scratch
Day 1: Getting Started With the Framework
Day 2: Database Selecting Methods
Day 3: Sending Emails
Day 4: Newsletter Signup
Day 5: CRUD
Day 6: Login
Day 7: Pagination
Day 8: AJAX
Day 9: File Uploading and Image Manipulation
Day 10: The Calendar Library

CodeIgniter Registration Form
Introduction to CodeIgniter
CodeIgniter Registration Form Part 1
CodeIgniter Registration Form Part 2
CodeIgniter Registration Form Part 3
CodeIgniter Registration Form Part 4
CodeIgniter Registration Form Part 5
CodeIgniter Registration Form Part 6
CodeIgniter Registration Form Part 7

Developing a Website with CodeIgniter
Code Igniter Part 1: Configuration
Code Igniter Part 2: Users database table and users model
Code Igniter Part 3: The Login Process
Code Igniter Part 4: Admin Site Crud

Code Igniter Sample Application
Templating
Models
View and controller organization
Unobtrusive javascript enhancements
Scriptaculous effects and autocomplete
AJAX and dynamic information retrieval
Caching pages for performance