IRC
IRC Server: irc.quakenet.org
Channel: #fce2

UT-IRC
UT has a buddy search.

Just doubleclick a friend in UT-IRC and in the window type something (anything will do) and you will get a message that the user is away and his IP.
Just click the IP and you will join his server.
For individual ICQ and E-mail adresses see our Members section.