atom-shell absolutely has made the switch to io.js, that's where Atom's node comes from.

Huh, I just downloaded the latest atom-shell and ran a hello-world that dumps the "node" version and it says v1.0.0-pre. That sounds like IO.js alright.

Why then would they still refer to "Node" in the release notes, all the way up to the most recent version??

"Fix initializing node integration in the webview when the page in it navigates."[1]

https://github.com/atom/atom-shell/releases

That's just a typo, it indeed does refer to io.js integration in WebView tags.

It might be about a DOM node, not the Node project.