For years The Mana World has used many different channels on the irc.freenode.net. As of now, all The Mana World related channels have been moved to irc.themanaworld.org, our own IRC server.
The move is mainly due to an increase in abuse to our channels, which was not addressed properly by FreeNode staff. This new IRC server should be better for players, since they can generally expect their nick to be available and we will in the future be able to provide more elaborate services.
Discussion and coordination about client and server development, which has recently separated to the Mana project at http://manasource.org/ , will still happen on FreeNode in the #mana channel.