Etienne Wegner is a leader in the field of CoP. He along with Jean Lave coined the term. This is his website and it provides a direct introduction to the concept and the application of communities of practice.

This slideshare presentation by Xiaoyu Wen outlines the main points of each chapter of the Cultivating Communities of Resources book by Wegner, McDermott, and Snyder. I think the best part is the list of linked resources on the final slide.

iNACOL just released this new report as a guide for K-12 districts. The report outlines best practices in collaborative content development for online courses and resources, and then making those resources available to all other districts. The idea behind open educational resources is to create a community that shares ideas and builds upon the work of each other.

Great resource for national and state-by-state data on K-12 online learning. I subscribe to their blog as well.