An Integrated Model of Multimedia Effects on Learning Andy Hede, University of the Sunshine Coast
Well, despite the distractions on the way across the OSU "Oval" this sunny day, managed to get a little research done in the education library. Not all that encouraging, if you're looking for hard evidence of what works.

This 2002 article takes a look at studies of Multimedia efficacy, and proposes a model of learning. Stay tuned...