Flex has become more accessible
The Flex module for Apache and IIS provides web-tier compilation of MXML and ActionScript files on Apache and IIS web servers. This lets you rapidly compile and test an application by simply requesting the main application file from a web browser, similar to working server-side scripting languages like PHP, ColdFusion or JSP.
That means that writing a Flex application has become easier then ever. All you have to do now is to write your MXML and ActionScript code in any editor you want and just go into the browser and hit F5.
You can find more details and download it at Adobe Labs
