The Flash and Flex Apllication Framework Parsley has been released in Version 2.0. The feature list really looks nice:

• Flexible IOC Container: Supports configuration with AS3 Metadata, MXML, XML files, ActionScript
• Dependency Injection: Injection by type or id - for constructors, methods or properties
• Messaging Framework: Fully decoupled senders and receivers, can serve as a basis for MVC architectures
• Flex View Wiring: Easily wire Flex components to objects declared in the container
• Advanced container features: Asynchronously initializing objects, object lifecycle, modular configuration contexts
• Integration with Flex Modules: Allows configuration to be loaded and unloaded alongside Flex Modules
• Localization: Integrates with Flex ResourceManager for Flex Applications, contains its own Localization Framework for Flash Applications
• Extensibility: Easily create your own configuration tags, a single implementation can be used as AS3 Metadata, MXML or XML tag