The Flexifier is live at http://try.flex.org today. The Flexifier allows anyone to try Flex MXML and AS3 programming without downloading or installing anything. Simply type some MXML or AS3 into a form and you can see the resulting SWF file instantly.
The Flexifier was developed by Ben Forta, Ray Camden, and myself. The backend is powered by a customized build of ColdFusion and the Flex SDK.
Check out the Flexifier!
Cheers,
ted :)
DIGG IT! 
Very cool concept. That will be great for helping newbies experience the technology, without all of the setup time and the cost of Flex builder.
The url is down!
There was a bug in the configuration which has been fixed now. All good.
Ted :)
why try.flex.org was down? is there a security problem?