Google Talk launched a new service today called chatback (found via Garett). It enables Google Talk users to post a badge to their website or blog, which allows visitors to open a conversation with them. Visitors need not have a Google Talk account, and all badges can be disabled in one click. The conversation opens in the Google Talk gadget – a web-based client. Visitors can see your status in the badge; if you set it to busy, then they won’t be able to disturb you.
Check out my badge. It’s posted below (if it doesn’t appear, it’s also on my contact page).