Meanwhile there are other choices that are about as easy, like Python libraries and Google's Go. Too bad they don't have the same zealous community support.
There is SpiderNode, not sure what the status of it is, but it replaces V8 in node.js with SpiderMonkey. SpiderMonkey already has yield and much other new JS syntactic sugar.
http://blog.zpao.com/post/4620873765/about-that-hybrid-v8mon...
Mentions they're working closely with the node team here. And that whole talk is about fixing up JavaScript into a modern language, remove the weird syntax quirks around classes, modules, etc. Say what you mean instead of the weird closure soup.