You can view demo of Shoutbox on the http://wallox.com main page
Also, if you are a registered member you can add the same widget on your dashboard
Plugin allows set ping interval, default text color and number of messages
Also it allows set color of message and add emoticons to users' messages
If member is a moderator of the site, he is able to remove ineligible messages from widget
Also admin can set badwords that will be filtered as *censored*
Plugin implements features of User roles, that gives Admin opportunity to control access to Shoutbox for Guests, Free members and etc.
For example, guest can only view messages, but he is not able to post or he should enter his name.