Bootstrapping an editor session is as simple as POST'ing a simple form targeted at that url.
I would really love to see the Ember.js community get some use out of Plunker. (@filearts on twitter if you'd like to chat).
You can see a list of features on the development version of the site at: http://beta.plnkr.co/ These include:
* Real-time code collaboration
* Fully-featured, customizable syntax editor
* Live previewing of code changes
* As-you-type code linting
* Transparent translation of intermediate languages like Coffee-Script, Typescript, Sass, etc (with sourcemapping included where available). This means you create 'app.coffee' and ask for 'app.js' in your html and you are served the compiled version of 'app.coffee' as well as its sourcemap.
* Forking, commenting (not done yet) and sharing of Plunks
* Fully open-source on Github under the MIT license
Also, there is both a Google Group (http://plnkr.co/discuss) and github repo (https://github.com/filearts/plunker).
That being said, neither of these properly address your question. I will push out an about page as soon as I can.