Object-oriented programming with ActionScript 3.0

http://www.adobe.com/devnet/actionscript/articles/oop_as3.html

Automating tasks with Javascript Flash

http://www.adobe.com/devnet/flash/articles/jsfl_overview.html

What’s new in Flash 8

http://www.ultrashock.com/tutorials/flash8/newInFlash8.php

Configure your Flash Applications using XML

http://www.dmxzone.com/ShowDetail.asp?NewsId=11482

Hidden Gems in Flash MX 2004

http://www.communitymx.com/abstract.cfm?cid=53778

Building Tools for Flash MX 2004

http://www.communitymx.com/abstract.cfm?cid=80BB5

Customizing components in Flash MX 2004

http://mxdj.sys-con.com/read/37918.htm

Books

Object-Oriented ActionScript 3.0 (Friends of ED, 2007)

Object-Oriented ActionScript for Flash 8 (Friends of ED, 2006)

Flash MX Most Wanted Components (Friends of ED, 2003)