A talk by Daniel Pipes followed by a panel with Salim Mansur and Brian Lee Crowley.
Daniel Pipes' comments are based on his article by the same name, "Islam vs. Islamism," The Washington Times, May 13, 2013.
July 23, 2013 update: Salim Mansur, my fellow panelist at this event, has today published a fine article on "Islam and Islamism." One quote:
Islamism is an aberrant strain of Muslim thinking that can be traced back in the Arab-Muslim history to the earliest years of Islam. Its defining characteristic is intolerance of others, including Muslims, and glorification of violence against all who disagree with the Islamist rendition of Islam.