At long last, FlashDevelop 3 Beta 8 has been released. Here's a list of what's new:

Changes:

GUI:
* New "fullscreen" editor mode
* New common GUI for AS2Api and ASDoc
* SWF exploration shows the frame where definitions are imported

ActionScript:
* Fine tuned code completion
* Dynamic syntax highlighting: custom classes get colored like flash classes (MovieClip, Event, etc)
* Completion for package-level declarations and Flash 10's Vector.<T> type
* New generator: Ctrl+Shift+1 on a non-imported type to generate the import
* Go To Declaration (F4) with SWC classes display a generated pseudo-class
* Improved generators

MXML:
* Tags with ID now appear in outline view and <script> code completion
* Updated completion (generated using a tool available in SVN)

Templates:
* Improved MXML projects templates
* New optimized AS3 project template with preloader (no Flex dependencies)
* Templates now include an index.html with swfobject.js

PHP:
* Now featuring simple PHP completion

Well what are you waiting for? Go get it!