That sounds like a very good (if not necessary) idea.
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
