MIT Open Courseware Reaches 500 free course offerings

The MIT Open Courseware Project has reached their initial target of 500 courses posted to the web. Some of the courses that caught my attention included the following:
Law and Society Spring 2003
Causes and Prevention of War Spring 2001
Competitive Decision-Making and Negotiation Spring 2003
Communication Skills for Academics Spring 2002
Argumentation and Communication Fall 2002