Bitlbee supports XMPP/Jabber (including Google Talk), MSN Messenger, Yahoo! Messenger, AIM and ICQ and creates a localhost IRC server you can connect to with say EMACS ERC irc client. Great for the whole ssh -> screen -> EMACS -> ERC deal.
It's quite nice for consolidating all your communication inside of Emacs (IRC via ERC, mail and news via GNUS, IM via bitlbee), etc.
Luckily, Bitlbee compiles out of the box on AIX, and you don't even need root permissions to use it.
Simply download it and compile it with say gcc:
% gunzip -c bitlbee-1.2.3.tar.gz| tar xf -Now connect your IRC client to localhost port 12345 and create your account.
% cd bitlbee-1.2.3
% ./configure --ssl=openssl
% ./bitlbee -D -n -v -i 127.0.0.1 -p 12345 -c ./bitlbee.conf
account add yahoo username password