1) http://learn.adobe.com/wiki/display/Flex/2b.+Code+Files
 
2) http://livedocs.adobe.com/flex/3/html/index.html
 
3)  http://examples.adobe.com/flex3/componentexplorer/explorer.html
 
4) http://www.adobe.com/devnet/flex/videotraining
 
5) http://examples.adobe.com/flex3/consulting/styleexplorer/Flex3StyleExplorer.html#
 
6) http://www.adobe.com/devnet/flex
 
7) http://opensource.adobe.com/wiki/display/blazeds/BlazeDS/
 
8) http://flex.org/
 
9) http://www.adobe.com/cfusion/communityengine/index.cfm?productId=2
 
10) http://www.cnblogs.com/aierong/archive/2009/02/24/Air_chatroom_flex_fms.html
 
11) www.riachina.com
 
12) http://www.adobe.com/products/livecycle/dataservices
 
13) http://flex.51CTO.net/
 
14) http://www.airia.cn/index.php?showtopic=29
 
15) http://examples.adobe.com/flex3/devnet/configurator/Configurator.html#app=76d2&c848-selectedIndex=3
 
16) http://www.adobe.com/devnet/flex/articles/tracepanel.html
 
17) http://www.adobe.com/devnet/livecycle/articles/blazeds_spring_05.html
 
18) http://www.adobe.com/devnet/flex/articles/flex_security_03.html
 
19) http://code.google.com/p/slf4fx/wiki/FourSimpleStepsToStart
 
20) http://www.adobe.com/devnet/flex/articles/custom_validator_04.html
 
21) http://www.adobe.com/devnet/dreamweaver/articles/form_validations.html
 
22) http://www.mindtheflex.com/?p=67
 
23) http://www.adobe.com/devnet/flex/tourdeflex/web/#sampleId=3700;illustIndex=0;docIndex=0
 
24)http://www.adobe.com/devnet/flex/?view=samples
 
the official documents is excellent and exceed others