From GoogleTalk blog ..

Do you have a blog, online profile, or some other personal web page? Would you like to communicate more with your visitors? Today we’re launching a new Google Talk feature that lets visitors to your web site chat with you. We call it “chatback” because instead of you doing all the talking on your blog, your visitors can talk back to you. Sure, they could leave comments, but those are public and hard to use for a real conversation. With chatback, it’s a real instant message session.

To use chatback, you must have a Google Talk account … but your visitors don’t have to! They don’t even need to have an email address, or to have ever used instant messaging.
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