Detailed rubric for multimedia projects in multiple categories (preliminary work, design, content, presentation). This has held up pretty well considering the rubric is dated 1998.
Assessing the Online Learner by Jossey-Bass Online Teaching & Learning Series
15-minute podcast interview with Palloff and Pratt on assessing online learners and social presence. They talk about authentic assessment rather than closed-book quizzes, based on the assumption that students will cheat on tests and quizzes but responding to scenarios is a better measure of learning.