After joining the social networking service ResearchGate (like facebook for technical researchers), they are posting a “Theories of e-Learning” string. http://www.researchgate.net/topic/Theory_of_e-Learning/
As an instructor in the Masters of Engineering Professional Practice degree (online), when I read these kinds of strings, I know that I have been very fortunate to be thoroughly embedded inside such a great online degree program. The biggest detracting element for any online program, I think, is getting instructors to create an engaging atmosphere. It does take more than parking a video camera a the back of the room and capturing a lecture (which we rarely do). Reconfiguring the learning for e-versions is a complete re-do, most often, and it requires constant upkeep.
I was also reminded in the last few days of an old experiment at the U of Wisconsin called “e-Teach.” A similar product is now being used by my hushand for streamingmedia.com–it’s called KnowledgeVision, and it shows much promise for some of the mose basic delivery needs. http://www.knowledgevision.com/