Absolutely Awesome! One more thing is needed, however. The ability to be able to save the modified sources to the server (with appropriate security of course, dev-env only). Also the ability to fetch the server sources from the server, if e.g. I'm running a Node.js and I want to debug and edit the JS in Chrome - <i>along</i> with the client side JS, side by side.<p>The close we programmers are to the "living code", the better. The file-watching, auto-reloading and re-executing BDD's (or TDD's, etc.) like vows (<a href="http://vowsjs.org/" rel="nofollow">http://vowsjs.org/</a>) get pretty close to it, but it's not the same.<p>When I'm coding a function, I want to be able to run it anytime (when the syntax is OK of course), and in the environment of my program.<p>Great stuff. Also similar in-client code editing efforts, Firefox: <a href="https://github.com/Gozala/sky-edit" rel="nofollow">https://github.com/Gozala/sky-edit</a>, general: <a href="https://github.com/ajaxorg/ace" rel="nofollow">https://github.com/ajaxorg/ace</a>