One nice thing about NECC is that many presentations are available after the convention has ended. If this opportunity is new to you, you can locate these resources at http://www.kzowebcasting.com/necc/.
I have been taking advantage of this opportunity for the last several days. Today I watched Chris Dede and colleague describe Edtags. Edtags is a social bookmarking site for educators. The primary focus is on tagged links to educational content, but some additional services are available.
I have operated my own bookmarking site for several years. It made sense to me to create a core of focused educational resources for a target audience and then allow this audience to expand this list. My site began as a resource to extend our books, but I have expanded the purpose to include resources of more general educational value. My site and the Harvard site are both built on an open source project named Scuttle and we have each modified the open source resources to extend services.
I would recommend the NECC session available through the link above as a way to understand some of the key ideas behind these sites and what makes them different from general purpose bookmarking sites.
