Adobe released ASDoc. An Actionscript3 documentation tool. The official Flex 2 Language Reference has been created with ASDoc. No need to work on AS3Doc any longer.
I must say that I really like Adobes attitude about the Flex2 SDK, a free documentation tool and all the free APIs. Great work!

Ok, this is crazy. So now that ASDoc is out for Flex, there are no documentation generating tools for Flash AS3!!
(ASDoc compiles the code and does not know how to handle the differences between Flash CS3 AS3 and Flex 2 AS3!!!)
Help! I need to document my Flash CS3 AS3.
Has anyone figured this one out? How do you document FLASH AS3?
I am not aware of any problems? But since I believe that code does not belong into the Flash IDE and I do not even have it I am not very motivated to update my old documentation tool :)
You can use ASDoc in the command line to document your code. You don’t need Flex Builder just the free Flex 2 SDK. Adobe does a pretty good job of documenting how to do this.
http://livedocs.adobe.com/flex/201/html/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Book_Parts&file=asdoc_127_1.html
Enjoy!