Chat with your friends from right inside Gmail. There's no need to load a separate program or look up new addresses. It's just one click to chat with the people you already email, as well as anyone on the Google Talk network. And now you can even save and search for chats in your Gmail account.
Here is more on the chat feature.
What sticks out to me is the "off the record" feature that stops your chats from being recorded. Privacy is getting hotter and hotter. CONTACT: Leave me a Houston or Texas media news tip | COMMENT: Click to leave your thoughts on this post here