I often - at least once a year - go to Flash conferences to talk about Haxe
A lot of ActionScript developers are interested in giving Haxe a try, but the main reason for not giving it a try is because of (lack of) IDE support.
Back in the old days, it was hard to switch between languages because of the need to adapt to a new syntax and to the changes in standard library. Since you needed to remember all the API, you were spending most of your time switching between your code editor and the API documention.
Today, IDE completion is very useful and will help you to learn/discover the API of a new language. With a good syntax support, you'll also avoid most of the troubles getting used to a new syntax. But while on one hand a good IDE will help you discover new languages, on the other hand switching to another IDE or (even worse) back to a bare text editor is very hard for some developers.
This is one of the many reasons why IDE support is important for Haxe.
In order to ease IDE integration, we have been supporting from a long time compiler based completion, so you won't have to rewrite Haxe Type Inference algorithms in order to display completion tip. This support help the community developing Haxe support in several IDE, including TextMate, FlashDevelop, Emacs, Vim, and a lot of others...
But every developers have their own preferred IDE and I being myself IDE agnostic, I'm always happy when I see a new IDE supporting Haxe.
This is why I'm very happy today to announce the alpha version of Haxe support for FDT, one of the best Flash IDE out there, widely used by ActionScript developers around the world !
Many thanks to PowerFlasher and Influxis, and the FDT team to making that happen !