Imagine how excited I was to see my grandmother implement her own node.js based chat app.

Well, I was writing it for Mashable. ;)

In other words, I tried to make it interesting to a technical audience but still comprehensible to the average reader. I'm working on a more technical "how to get started with Node" post with code samples; that should be up in a couple weeks.

There isn't an issue with that. As a technical user, I find the article interesting and had facts I didn't know about.

Voxer sounds cool.