This document provides an overview of Adobe Flex, including what Flex is, the Flex 2 product line, how Flex works, resources for learning Flex such as mailing lists and code examples, libraries and components for Flex, and some example Flex applications. It discusses features of Flex like visual layout, code hinting, debugging, skinning and styling, data services, MXML, ActionScript 3.0, and the Flex framework. It also provides various links and resources for learning more about Flex.