The chromium team is currently actively working on a Chrome App based Development Environment
codenamed Spark at https://github.com/dart-lang/spark
This IDE project is full of goodness:
- It is built with Dart¹, the "new language for scalable web app engineering"
- It contains a GUI widgets library powered by Polymer²
- It's public on GitHub and therefore interesting for anyone who wants to know how Dart and Polymer can be used to build the next generation of Chrome Apps.
Yet, this is still the very beginning. There's not much we can do for now.
I'll definitely keep an eye on this one though.