Google Talk Chatback?
Thinking about real-time communication with your visitors who go to your library’s blog? What about providing answers to a patron who has a quick question on a class posted on your website? Google Talk just launched a new chatback feature that allows visitors to your website to chat with you.
Chatback uses the web-based Google Talk Gadget, and your visitors don’t need to download or install any software. They will see a badge on your website or blog showing your online status, and can start chatting with you by clicking on the badge. It’s easy, it’s simple, and it’s free.
To get started, you need to copy the provided HTML code from http://www.google.com/talk/service/badge/New and insert it to your website or blog.
The only thing required is a Google Talk account from your end (if you’ve had a Google account or Gmail account, you automatically became a Google Talk user), and nothing is needed from your visitors’ end.
Here is the original post from Google Talk blog: http://googletalk.blogspot.com/2008/02/google-talk-chatback.html