We've launced a public discord server at https://discord.gg/lemmyworld
The reason for why we choose discord is because it was easier to moderate and manage than other options. Besides we also had a discord-bot guru by the name of Rooki who created a neat bot that allowed us to connect/verify discord users to their Lemmy World account.
So if you are a moderator and you are looking for some extra hands to moderate your community, or if you need to contact anyone from the LW team, this is the most efficient way to do it!
Come have a look!