There is already an unofficial SpongePowered Discord channel that happens to have a few of the Sponge team lurking in it… https://discord.gg/0nK7oXiARNFHwlDP
We don’t want to spread the staff thin over too many channels, so it may never get “official” status.
It may eventuate that he existing official Sponge TeamSpeak may migrate to a system with more user capacity (which is the main limitation of the present system).
EDIT: Someone killed the link.