How do I add a buddy in iChat?
Your Buddy List allows you to see which of your contacts are online so you can start a chat with them. iChat can display a different buddy list for each service it supports. To switch through the different buddy lists, you can use the Window menu. There will be an option for the default buddy list (which has your .Mac/AIM contacts), the Bonjour buddy list (for contacts on your local area network), or the Jabber buddy list (for GoogleTalk contacts).