The Christian room on the Chatopia server is ran by christian.whyi.org. It is a small but worthwhile community.
Excerpt from their sire: We are an Internet Relay Chat (IRC) community of Christians for fellowship, discipleship, and encouragement in the faith. We are not the only Christians on IRC, but we do also seek to make a positive difference in Cyberspace and in our lives for Christ and in the lives of those we meet, whereby serving one another in love.
If you would like to connect to Christian (Chatopia) via an IRC client, point your client to: irc.chatopia.net port:6667 and join ¦christian