The software company I co-founded, GoingOn, has recently launched an initiative of UPenn's College of Liberal and Professional Studies (LPS).
The Global Environmental Sustainability Collaborative is an online forum and course that is open to the general public. Join if environmental and sustainability issues interest you! More from their site:
Please join faculty and students from The University of Pennsylvania, Kyung Hee University, and Ritsumeikan University, in a global, multi-continent discussion of issues around Global Environmental Policy and Sustainability led by Dr. Don Kettl, Professor of Political Science and Robert A. Fox Professor of Leadership at the University of Pennsylvania. On this site you have access to the course syllabus and reading list, as well as have "real-time" access to course lectures and discussions as they unfold. We invite you to join the conversation at no charge as a member-at-large. Create a profile, and join the course conversation as it evolves. As a member you will be able to add your thoughts to the course Comment Wall, Blogs and Forums. Members can also network with each other via email and instant messaging using the "Facezone" on the right. Offering a Penn course in an open online forum is an exciting new initiative at Penn. As you participate in the course this Spring, please share with us your thoughts and feedback on the experience.
If you're interested in bringing a similar initiative and collaborative platform to your academic institution, contact GoingOn's CEO, David Popler, at davidp[at]goingon.com