Native support for Adobe AIR – Flex 3 introduces new
components and incorporates the Adobe AIR development tools into the SDK and
Flex Builder.
Persistent framework caching – You can make Flex 3 applications as small as 50K when leveraging the new Flash Player cache for Adobe
platform components.
Flex Builder productivity enhancements – Flex Builder 3
introduces refactoring support, new profilers for performance and memory
tuning, and code generation tools for data access.
Integration with Creative Suite 3 – The Flex Component Kit
for Flash CS3 allows Flash CS3 users to build components that can be seamlessly
integrated into a Flex application, while Flex Builder 3 adds new wizards for importing
assets from CS3 applications as skins.
Advanced DataGrid – The Advanced DataGrid is a new
component that adds commonly requested features to the DataGrid such as support
for hierarchical data, and basic pivot table functionality.
First steps toward open source Flex.
clipped from: www.adobe.com