One of my customers wanted to discuss problems with me by MSN. But my office desktop is installed Fedora 15 and not windows. I searched on the net, and found pigdin can solve this issue. The method of installation is very easy.
Install pidgin package
# yum install pidgin
Run the pidgin
or click Applications->Internet->Pidgin Internet Messenger
The pidgin command provide debug mode, if you met any problem, you could run on this mode
$ pidgin -d
If you could not run it, please check if port 1863 is open or not to you on the firewall.