Keith Devlin has recorded a 3-minute video advertising his Introduction to Mathematical Thinking MOOC on Coursera.
In this, Keith explains the aims of the course, which includes elements seen previously on his MOOC Talk blog, and discusses the structure of the course and a little about the MOOC concept.
http://www.youtube.com/watch?v=YFs06zgBfMI
According to a tweet from Keith on 27 August, over 33,600 students have registered for the course since registration opened in July. The course starts on the 17th of September.
More info: Introduction to Mathematical Thinking on Coursera