Adobe Flex 3 is released now. It is a cross platform, open source framework for creating rich Internet applications that run identically in all major browsers and operating systems. The Flex Builder 3 beta release will provide you with an opportunity to explore powerful new features, communicate early feedback, and test existing Flex applications with the new Flex 3 framework. Some of the new major features include

• Support for the new Adobe® Integrated Runtime (AIR).
• Code refactoring.
• Memory and performance profilers.
• SWF file size reduction through persistent framework caching.
• Advanced datagrid.

Really it is usefull for Rich Internet Applications.

thanks

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Karpagarajan. R
Necessity is the mother of invention