Comment by hunterloftis

Heroku node maintainer here. No official docs yet (it's like an hour old already! :) but it works about the way you might guess: use engines.iojs instead of engines.node in your package.json.

(screencast: https://twitter.com/HunterLoftis/status/555234067520565249)

We're also excited to see node hit a 1.0 and merge in new V8, ES6 features, etc. I'm especially excited about Cluster's round-robin load balancing which has been a compelling reason to use 'unstable 0.11' for a while.