Thanks for starting this new thread, Jennifer, because it opens a discussion of the purpose of VPD. I'd like to respond to your last question with a question of my own: Why would we want to promote "pedagogical instruction" in any mode and under any circumstances?
The etymology of "pedagogical" is rooted in the Ancient Greek word for the slaves who took little boys to school—girls didn't go to school in those days. Although pedagogical is commonly used nowadays to describe the instructional endeavour in general, I personally prefer to avoid the P-word and refer to teaching and learning methodologies. It's my small gesture to signal that I am not interested in ancient paradigms.
Also, I think one of the problems with our educational systems in crisis is that we are still talking about "instruction". I prefer to think in terms of co-construction of meaning through the interchange of knowledges in the plural. The online world is an ideal environment to foster these interchanges. Many contributors to this seminar have given excellent examples of the platforms and processes they favour. Although I can't claim to be as connected as many of you, I use my somewhat neglected blog to develop my theories, if it's of interest to anyone: http://knowledgesinterchange.wordpress.com/.
Jennifer, I hope you don't mind if I reframe your question so that it reads something like: How can we use VPD to promote interchanges which will help to construct new teaching and learning paradigms?