Ok, I am maybe late on this one but the beta 5 of FD3 is out…
Plus there is some cool plugins here http://code.google.com/p/fdplugins/ made by our friend alessandro ( www.sephiroth.it )
Enjoy

Hello everyone,

Flashdevelop is at its version 3 beta 2.
But the development is going so fast that they’ve decided to release some version in between the big release. Those version are zipped, stable one.
(more…)

Hi there.

I completly missed out this one. It has been released the 20th of this month.
Anyway here is THE LINK for this update fixing some bugs…

Here it is.
The so good editor flashdevelop has AS3 support.
This has been possible thank to Ben (returnundefined) and of course the flashdevelop team

You can download the files needed here:
>> AS3 Intrinsinc Classes
>> Flashdevelop Patch

Read this post on the Bit-101 Blog to see how to make everything work.