I got to play around with it at work. There are still loads to be done, but for a first beta-release it actually have a lot of nice features.
Github created a package manager (APM) besides Atom, to hold all the addons/plugins/packages that people would create. To really give Atom a go, I tried implementing one.
It does the exact same as my previous post about replacing old Ruby syntax with new, but now as a package I’ve created. Have fun with it.