If you're a Wordpress or Drupal user, you may want to participate in OpenX's private beta test for Wordpress and Drupal plug-ins. I recently signed up and received via e-mail the Drupal plug-in for Drupal 5 and Drupal 6. Will be testing the plug-in at my WriteLit.com site since I'm still using Drupal 4.7 for my other sites.