MP Shoutbox is essentially open source abandonware. It is no longer actively developed. However, if you are interested in cleaning up the code, feel free to contact me. I'll be glad to help out.
MP Shoutbox (aka Text Shoutbox) is a simple shoutbox project which uses no MySQL at all, which means it can be uploaded on any server that supports PHP. It is very easy to modify and holds a lot of potential for advanced PHP scripters. Out of the box, it contains a spam blocking script, a shout manager, and the ability to pin messages at the top of the shout list. The CSS is completely customizable and the layout is horizontal, which means it can fit at the top of any website or message board. It barely takes up any space, and is easy to set up and install. If you need a bare bones shoutbox with a lot of options, try MP Shoutbox today!
Bazaar: bzr branch lp:~tboxley/+junk/mpshoutbox