O'Reilly has published an excerpt from the upcoming book on enterprise development with Flex.This advanced book covers variety of practical topics such as comparing Flex frameworks, unleashing the power of BlazeDS, designing your own library of reusable components, Flex portal, modularization and more. The book is written by practitioners and for practitioners.
The excerpt from chapter 3 of the upcoming book "Enterprise Development with Flex" is available over here.