Authentication System

We have a web application, and are adding some "community" features. The website is LAMP-based. We've added SMF Forums and MediaWiki, and all aspects of the site are accessed via a single login. The shared authentication is managed via Joomla. (The user interfaces are highly cuustomized, and we've added WYSIWYG to all components.) We seek someone who is an expert in these technologies (primarily PHP, also mediawiki, SMF forums, and Joomla) to help with bug fixing and future development. - debug or replace authentication code - small bug fixes (mostly cosmetic) to mediawiki and SMF - migration of DB changes and community features from test site to live site Please include links to samples of work using these technologies in your reply.