The Drupal 7 Usability Team is doing usability tests at the University of Baltimore. Drupal is one of the few open source content management projects that does formal usability testing and is so public about the results. Here is a nice short vlog showing Dries' reaction to usability testing done last year on Drupal 6 at the University of Minnesota. It shows how he took in the information, his surprise, and how he resolved to make adjustments. Also nice heatmap diagram of where the users looked.