The theme for the 2009 Leeds is Heresy and Orthodocy. See the Call for
Pages page:

http://www.leeds.ac.uk/ims/imc/imc2009_call.html

I am organizing sessions on Political Use of the Accusation of Heresy.
Thus far I have 5 proposed papers, most concerned with Marsilius of
Padua, William of Ockham and their later place in political debate.
There still is room for more papers, and I need a volunteer to chair the
session in which I hope to give a paper. Please contact me soon. The
deadline is at the end of this month. A working title is necessary, and
an abstract would help me put things into order.