Today I found this gem from dzone.com…
Very First Steps in Flex
Rich Internet Applications and Flex are taking off. Many developers need to learn Flex fast. This refcard will help readers get started learning Flex. Firstly, a simple “Hello, World” application which will help familiarize readers with the Flex Builder tool and programming model. Secondly, we'll go into depth about how to connect Flex applications to back-end data through RESTful XML and SOAP. And lastly, “Remoting and Messaging with Java” walks through how to easily connect to a Java back-end with the open source BlazeDS product.
Features include Hello, World, Web Services, Remoting and Messaging with Java, Hot Tips and more.
I think it is nice.