One can reach the OpenACS channel at irc://irc.freenode.net/#openacs. Mozilla users (with a complete install) can simply follow this link. Others open their favorite IRC client and connect to the irc.freenode.net server. Then join the #openacs channel.
Be sure to enter your IRC nick name as your screen name on openacs.org. Our log bot will then link your nick to your openacs.org profile in the logs. To enter your nick name go to your account and follow the update link.