A HootCourse is an online classroom that combines some of the most popular social networks, as well as blogging platforms, to offer a new type of online classroom. Each course is built on tweets and status updates, all in real-time. With no real structure to each course, they are easy to create and use.
http://blog.learningtoday.com/blog/bid/40670/Heard-the-Hoot-HootCourse-Online-Classroom-Tool