ChatCreator

Not that I have enough people that frequent my site to warrant this, but ChatCreator is a cool service. From the site:

"To create your chatbox which is easily embedded in any web page, type in the desired name of your chatbox which will appear on top. Select the desired color scheme. Write in the desired size in pixels and click GENERATE."

It's simple, clean, easy and sets up in seconds. I originally read about it over at Cnet.