Just a quick note about two great articles which were recently published:

[ActionScript Collections and Functional Programming][1] by Bruce Eckel
  
In this article Bruce provides examples and insights into the functional pieces of ActionScript. He also covers some of the lesser known things about Collections. I learned quite a bit from this one!

[InfoQ Case Study: NASDAQ Market Replay][2]
  
Jon Rose worked with NASDAQ to create a great case study about using Adobe AIR, Flex, and Amazon S3.

 [1]: http://www.artima.com/weblogs/viewpost.jsp?thread=230610
 [2]: http://www.infoq.com/articles/nasdaq-case-study-air-and-s3