A new section on the Adobe Developer Connection it’s up , ActionScript 3 migration cookbook and it looks really usefull if you’re still using ActionScript 2 on a regular basis this cookbook would be a good migration point.
You can already see some entries online or download the pdf version of the ActionScript 3 migration cookbook
An excerpt form the site:
The ActionScript 3 migration cookbook beta provides a quick introduction to migrating to ActionScript 3 from ActionScript 2. It is targeted at designers and developers who have some experience scripting content within Adobe Flash CS4 Professional. It does not require an understanding of object-oriented programming.