The website invites non-Harvard students to follow along and includes the class handouts, problem sets, and quizzes. There is even a Google group for non-Harvard students to ask questions and discuss the course material with others.
-- Information is current as of June 28, 2012
Developer's Channel Description: Demanding, but definitely doable. Social, but educational. A focused topic, but broadly applicable skills. CS50 is the quintessential Harvard course.
CHANNEL STORE CATEGORY: Educational