Based on the Lamernews source, I did a small proof-of-concept for a backend with Node.js, Redis and Promisses. Haven't time to release it, but I might write a small blog post about what I did so far.
If you have time for a blog post, that would be interesting for sure! Not only from a Lamer News perspective but also regarding porting Ruby code to Node.
if interested, we could have a small mailing list to dicuss a backend for EchoJS with Node: https://groups.google.com/forum/#!forum/echojs
Once this is setup, we could also try out something like rendr - shared rendering client/server