A Moodle Working Group at York University has conducted two rounds of Moodle v. 1.8.2 UX walkthroughs, paralleling those undertaken by the Sakai Working Group. Two members of this group have also completed an initial accessibility walkthrough of aspects of Moodle using Colin's Simple Accessibility Walkthrough Procedure.
The first Moodle UX walkthrough round, completed prior to the Fluid Summit, followed the same procedures as employed by the Sakai group, and used the same faculty persona and instructor scenarios. The report of our findings presented in tabular form can be found here. The accessibility report (here)includes some comments on the accessibility testing procedures and questions as well as the findings.