Flex 4, codenamed Gumbo, is now beginning active development. The
product plan is not yet complete, but a few themes are under
consideration:
Design in Mind:
Provide a framework meant for continuous collaboration between
designer and developer. Probably involves an additional component
model that integrates with the existing Halo components.
Accelerated Development:
Take application development from concept to reality quickly. Features
could include application templates, architectural framework
integration, binding improvements.
Horizontal Platform Improvements:
Features that benefit all application and user types. Features could
include compiler performance, language enhancements, BiDi components,
enhanced text.
Broadening Horizons:
Expand the range of applications and use-cases that can leverage
Flex. Features could include finding a way to make the framework
lighter, supporting more deployment runtimes, runtime MXML.
Download Flex 4 Build >>
http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4
Cheers
Varun Rathore