The chat system has been re-worked and updated. Chat with your friends between or during games, join different channels, and use emojis. Here’s a quick little primer:

/join #channel – this will join the channel called ‘#channel’.
/whisper David hello! – send me a private message saying hello. I love to chat to players and hear about your experiences, so please actually do this.
#channel hi – send a message to the channel ‘#channel’.

The emojis you’re familiar with are available too.
You know, things like 🙂 and 🙁 .