http://www.apple.com/macosx/whats-new/features.html#ichat6
This sounds very interesting, I have always liked iChat but it has never supported MSN which is what I use.
Service plug-ins
Service plug-ins from third-party developers let you add new chat services to iChat. Installing a plug-in is simple. Once its downloaded, double-click it. Plug-ins run in a separate process to help ensure that they wont damage your system.
This sounds very interesting, I have always liked iChat but it has never supported MSN which is what I use.