If you have a website or blog of your own Yahoo has a new service called Pingbox that allows you to chat with users directly when they are on your site. You can even use this on your profile page for social networking sites like Facebook and MySpace. You just go to their site (http://messenger.yahoo.com/pingbox/studio/) and select some options on how you want your char window to look. Push the button and they generate some code that you copy and paste into your site or profile. There's nothing to install and this service is completely free.