Haxe is a nice language, though I don't like it's verbosity (hey, it's almost like Java!). Maybe I'm too much spoilt with coffeescript, ruby, python and other syntax-sugary languages.
It may still be a bit more verbose than Coffeescript or Python, but once your code is written you can theorically run it almost anywhere :)
Would like to use this for the game I'm working on since the idea of write once, compile everywhere is seductive. Of course I seem to recall that when Java first came out that was supposed to be it's claim to fame...
It basically provides an implementation of the Flash API for the C++ and Javascript targets, besides the SWF target that Haxe offers natively.
It also comes along with tools that allow this generated C++ code to be easily compiled and deployed to Android, iOS, Blackberry and WebOS devices.
So, if you write an app that targets Flash Player using Haxe, you can use NME to deploy to all these targets with no modification to your code.
I know it sounds superficial, but I'd love a CoffeeScript-like alternative syntax for Haxe. That would probably elevate it to the number one language choice for game programming for me.