Over on Kairosnews, I've posted links to the classroom sites that are using Drupal:

Using Weblogs: Teaching with Drupal - In a continued effort to integrate blogs into the classroom, Terra Williams, Dustin Anderson and myself are using Drupal to teach our first year writing classes this summer. So far, things seem to be going well. Terra, Dustin and I all agree that Drupal is much easier than Blackboard for us to use as teachers and we feel like students are finding it easier to use as well.

Terra's class
Dustin's classes (two sections using one site)
My class