Well, not exactly AT the University of Michigan. I am taking Social Network Analysis through Coursera.org. Right now Free virtual classes are all the rage. Online courses in general are nothing new. U. C. Irvine, for example has several computer science classes available online, but they are about the same price as the in-classroom version of the same material.
What Coursera (as well as a few similar businesses ) offers is free on-line courses from top universities. There is a good introduction to some of the offerings in the TED Blog.
I signed up for Social Network Analysis because I have an interest in social networks, and in data visualization, which it seems would be part of the class. I've heard that some courses allow you to pay at the end for a completion certificate of some sort. I am just happy to get the information.
The TED blog lists a variety of courses that include ones available through ITunes, and YouTube.