Suggestions for ActionScript 3 Migration Cookbook?

As part of some of my recent work and research into ActionScript 2 to ActionScript 3 migration, I am working on an AS2 to AS3 migration reference cookbook. The core of the reference is the cookbook section which shows how to do commons tasks in ActionScript 2 and then ActionScript 3. The reference is targeted at users using Flash Pro to create animations and / or motion graphics and includes cookbook examples such as opening a URL, playing a sound, etc…

So, what cookbook examples would you like to see? I am looking for frequently used code snippets / tasks that may require different code in ActionScript 3.

Post any suggestions in the comments.

Btw, the guide will be released for free under a Creative Commons license.