自学FLEX，最有效的几个网站。
http://livedocs.adobe.com/flex/2/langref/index.html
This link goes to the reference docs for the entire Flex 2 framework. It is extremely helpful for learning the framework and the properties and methods for objects within the framework.
http://examples.adobe.com/flex2/consulting/styleexplorer/Flex2StyleExplorer.html
This link provides a Flex application that will allow you to quickly and easily create style sheet definitions, and see the changes in real time, on real flex components. This is very helpful for quickly making something look good, if you don't have a user experience designer handy.
http://examples.adobe.com/flex2/inproduct/sdk/explorer/explorer.html
This link provides a Flex application that will allow you to browse different kinds of Flex components. This helps you become familiar with the different components of the framework.
http://demo.quietlyscheming.com/ChartSampler/app.html
This has got to be the best example for Flex charting on the internet. You can see lots of different chart customizations, play with different data effects, and it has complete source code to achieve all of these capabilities. This one is HIGHLY recommended.
http://code.google.com/p/flexlib/
The FlexLib project is a community effort to create open source user interface components for Adobe Flex 2. There's a lot in there. you can see the full component list here: http://code.google.com/p/flexlib/wiki/ComponentList
http://labs.adobe.com/wiki/index.php/ActionScript_3:resources:apis:libraries
The Adobe Developer Relations team released a set of free and open ActionScript 3.0 APIs to help developers get started building Flex 2.0 applications.
来自：http://www.cynergysystems.com/blogs/page/andrewtrice?entry=userful_links_for_getting_started
