GMail team has updated GMail's chat feature with some interesting feature, which are group chat and new basic emoticons. Now you can have conference-like conversations with your friends. It's very convenient when you want to discuss something with more than one people at the same time. Rather than switching to different window every time, invite them into a single group and chat together
The second feature is a new basic emoticons. If you have used with Yahoo Messenger's emoticons, you will feel that the emoticons built on GMail's chat is very boring, but it's better than nothing at all.