By the way, after heard about new technology from Adobe and I have enough time to test. And I have tested it now. I write actionscript 3.0 in flex application to calculate pi value by Monte Carlo Method. I didn't use Flex Builder, but I used Flex SDK with FlashDevelop.
The result of testing is very cool. The calculation performed by actionscript 3.0 is very fast (let try it yourself with N around 1000000)
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This is it. Let try => http://physica.thai.googlepages.com/MonteCarloAS3.swf
This is a source code => http://physica.thai.googlepages.com/MonteCarloAS3.mxml
Have Fun. :)
Physica