This article / tutorial provides you with information that will let you create a PHP-based message board using NeoBoard or plain PHP. http://www.webtechniques.com/archives/2000/06/junk/
All sites need a community formed around them, and discussion forums are the ideal method of doing this. http://www.thescripts.com/serversidescripting/php/tutorials/discussion...
Having a website is cool, having a forum is fun.. but its really cool and fun when people post to your forum, and it shows up on your website http://forums.tutorialized.com/php-91/php-show-the-latest-forum-posts-...
This tutorial will guide you through the process of building a comments script with PHP. http://www.allsyntax.com/tutorials/PHP/24/Building-a-Comments-Script/1...
In this series of tutorials we are going to go through the development of a complete (yet very basic) community system. http://www.upgradetheweb.com/2007/07/31/building-your-own-myspacecom-w...