It would be interesting to set up a PLENK2010-like course but with no pre-determined content whatsoever. This course has no center with regard to the spaces used to interact with others (and content), but there is a "center" when it comes to content. Why not start with essential questions (that come from the participants and/or facilitators) and build a course around that. Each participant brings in content and experiences to the mix and suddenly learning truly emerges. Instead of front-loading content (e.g., recommended readings), facilitators could reference these same readings through forum discussions; in others words, as evidence to form an argument or point of view. Other members would follow suit.
I'm sure Dave see's shortcomings to this approach but the thought just occurred to me once again as I participate in PLENK2010 simply by responding to questions posted by members (and related readings referenced by them), then seeing where the dialog takes me.