Source suggestion
Hey Rob, You may want to take a look at Richard Cox's Ethics, Accountability and Recordkeeping in a Dangerous World. It's available at Koerner Library. Although most of the focus is on records management, it looks as though Chapters 2 and 3 might also comment on archives. It might also offer a different perspective on the subject. As well, were you planning on discussing Verne Harris? I was going to suggest that you do, and then I noticed that he is listed along with Zinn and Jimerson under "Major Contributors." I hope you do add a section on him.
Also, here's a Youtube video of a talk entitled "Archivists and the Call of Justice" given by Jimerson at UBC -- might be useful? http://www.youtube.com/watch?v=TeZiKVhZQLY