You might have seen the new google talk chatback gadget, which allows you to embed a chat icon in your blog/website so guests can chat with you, if you’re available. The cool thing is that they don’t have to have a google account to chat with you. The code from google comes in an iframe, which wordpress doesn’t like very much for security reasons. However, if you’re game, you can get it to work with a text widget (assuming you use widgets).