We’re using Slack, a web chat service. If you’d like an invite, please send an email to atom@github.com requesting one.
The core team is in there but the main purpose is to provide you, the community, a more user-friendly place to chat amongst yourselves. Let us know how it works out!
If you already have an invite from emailing above 
, you can get to the Atom and Electron Slack at https://atomio.slack.com.