[plt-scheme] Porting DrScheme/MzScheme to Adobe Flex

Has anyone looked into porting the DrScheme environment to Adobe Flex?  
If it were feasible, I see several major benefits:

* Can run in a web browser. No software to download and install.
* Can run as a standalone app (Adobe AIR).
* Cross platform. Just one codebase to maintain.
* Built-in access to rich audio, video, and graphics.
* Access to multimedia peripherals, such as webcam and microphone.

As of version 3.0, Adobe has open-sourced Flex. The Flex Builder  
Eclipse plug-in is free to educators and students.

What would be the challenges to porting DrScheme to ActionScript, the  
JavaScript-like language that powers Flex/Flash?

-B