You can group talk with Google Talk friends. Just click
here. Login, your google account
Click on the button at the top of the chat window that says "Group Chat," and then pick the name of the third (or fourth, or fifth...) friend you want to invite from the drop-down menu. They'll receive an invitation to join the group chat. If your friends are using Gmail chat or the downloadable Google Talk client, their invitation will launch the Google Talk Gadget.
(NOTE: This is NOT a fake Google website, some websites take your passwords this way, you can check the link or with McAfee SiteAdvisor).