In this presentation from the North Carolina Association for Educational Communication and Technology Shift Happens Conference, March 12-14, 2008, Sheryl Nussbaum-Beach shares her understanding of how to build online communities of Powerful Learning Practice. She really drills down into the topic, good insights!
Here is a Ustream.tv feed of the presentation. Below it you'll find the slide presentation and go here to find additional resources Nussbaum-Beach provides learners.
NCAECT Shift Happens 2008 Conference Wiki