I run several web sites based on the open source publishing system Drupal ([url removed, login to view]). It is written in PHP and powered by MySQL.
I would like to commission the creation of unique designs, or skins, or in Drupal terminology, "themes" for my site. It requires a designer or design team comfortable with PHP, and the PHPtemplate engine ( [url removed, login to view]). There is good documentation available ([url removed, login to view]) and several examples of GPL'd themes to use as a starting point. Previous Drupal work not required, but it's up to you to get up to speed on the system before the clock starts ticking.