I linked an Eberron IRC Channel back in March. Since then I’ve happened upon another channel, this time for the Greyhawk campaign setting. Greyhawk is a classic setting that provides the basis for the third edition of D&D, most visibly in the Player’s Handbook selection of deities and in spells named after NPCs like Mordenkainen, Otiluke and Tenser.
The channel is #greytalk at irc.psionics.net - that’s the Psionics-Anlarye IRC network. If you’re a fan of Greyhawk, please add it to your auto-join list and stick around.