DEN members are still SOCIALIZING on social networking tools of web 2.0. Updating a Texas blog post from last year, here are the latest on places to find the DEN:
Texas DEN’s Facebook: Texas DEN
Where else in the World Wide Web are you finding the DEN?
A side note: the DEN Ning at http://discoveryeducation.ning.com/ is listing as no longer available, due to the change to paid Ning subscriptions.