Theres a new (beta) version of the AS3 language reference with all Adobe frameworks included which can be included or filtered out at will:
http://help.adobe.com/en_US/FlashPlatform/beta/reference/actionscript/3/frames.html
Very useful in terms of documentation!
…Of course it also makes it apparent how ugly and inconsistent the different framework names are. flashx? And why have both adobe. and com.adobe.? Meh.
