KHAAAANNNNNNN!!!!! I mean MOOOOOOOOOCs!!!!!
Here is an interesting example where auditing is free and credit is pay. Secondly, if not firstly, this is the first in Canada (uAlberta) to get their beak wet. They are using Coursera, but also have a working relationship with Udacity on some experimentation. Either way, Bravo uAlberta. Now please be liberal with your findings!