Google has at last introduced Group Chat to Google Talk, it has been a feature we have all been used to in other chat programs but I have stopped using all the other chat programs. One stipulation you can only use Group Chat on the Google Talk Gadget which is integrated into iGoogle, which is the personalized Google.com homepage for each person. Its not integrated into the Gmail Google Talk or the independent Google Talk Application.
To use group chat just click a user you want to talk to and then click the Group Chat option, then you choose someone from your contact list to add to the conversation. What I like overall about Google Talk is the smoothness and simplicity of it. I will be waiting for Google to integrate this feature to all the Google Chat options.
Link: Lifehacker.com