I’ve found two tutorials on how to add Yahoo and MSN buddies to your iChat application. It works with iChat 3 found in Mac OS 10.4. Apple added Jabber to iChat which opens doors to adding in Yahoo and MSN abilities. Granted, it’s only chat. I don’t believe that any file transfers, mail notifications or anything like that work. Just plain and simple instant messaging. I haven’t tried it myself as I’m a big fan of Adium, however I may give it a try some day just to see it work. There are two tutorials to check out. One at Cafe Macs Lounge which looks simpler and one at All Forces Blog which is more in depth with pictures and such. Both do the same thing, and probably do it the same way, it’s just that one has pictures and more details.

If you get it to work let me know.