Only a few days after introducing the invisible mode in Gmail Chat, the Google Talk team added another great feature into the application - Chatback Badge. According to Google, “[a] Google Talk chatback badge will let visitors to your web page chat with you. They’ll be able to chat with you whenever you’re signed in to Google Talk.” Google’s description is not exactly true, but good enough. You will have to approve the chat request before the person can chat with you.

The…