The Frog God Games
Discord channel recently moved over to Tenkar's Tavern Discord channel
They have channels for publishers of old school games as well as content creators. You can get information about various products and kickstarters, join pickup games, etc.
I wonder if this would be a place for TLG to have a presence. So far it seems to be mostly be Swords and Wizardry and related material, but I think the idea is OSR in general.