Yes, we are open to that!
Bernd Paradies (
http://blogs.adobe.com/bparadie/) and I
(
http://blog.jangaroo.net/) have both openly been blogging about
how the corresponding tools cross-compile AS3 to JS.
We both learned from each other and I think there is a lot of
value in creating one best-of-breed way.
Still, Falcon JS and Jangaroo have a bit different goals.
Falcon JS wants to make your original AS3 / Flash code run
as JavaScript in the browser. Jangaroo is used to program
your JavaScript applications in AS3. The difference is that
Jangaroo applications usually reuse existing JavaScript libraries
like Ext JS, and only the application code is written in AS3.
Falcon JS applications will most likely use the Flash API,
or more precisely the re-implementation of the Flash library
for the browser / HTML5.
While technically, you could use both tools for both use
cases, Falcon JS is superior for code using the Flash API,
while Jangaroo has advantages for code using JavaScript
libraries, since it integrates more tightly with JavaScript
(for example when debugging in the browser) and offers
tools to create AS3 API wrappers for JavaScript
libraries, as well as a build process to mix and match
"native" JavaScript and JavaScript generated from
ActionScript code.
Since both use cases exist, I think the tools will
co-exists, too, at least for a couple of years.