Wii users using Opera can check their favourite Messenger services via the site Connection Tube, heres some info:

CommunicationTubeŠ - chat web messenger client for the popular IM (instant messaging) networks: ICQ , MSN , GTalk , IRC
It's a free web-client for the popular IM (instant messaging) networks which currently supports ICQ, MSN Messenger, IRC and Google Talk.
The biggest advantage of CommunicationTubeŠ that it's completely web based, no software download required. It makes CommunicationTubeŠ very convenient for people using public internet access such as internet cafe. With CommunicationTubeŠ you can be connected to multiply IM system simultaneously from one single web-based interface. Sending and receiving messages are done without page refresh which actually minimizes internet traffic and makes manual page refresh unnecessary. CommunicationTubeŠ based on http protocol and unlike other web-based IM's uses only port 80 which is very useful for customers with limited web access due to firewall limitations. No ActiveX, Java applets or popup windows are being used either. CommunicationTubeŠ does not store your user names or passwords on our server.

Check it out Via this addy -> http://www.communicationtube.net/

Let us Know how you get on