I think Ning just saved EdWeb. Not that it needed saving; however, eSchool News reported yesterday that Ning plans to move to a fee-based profit model, which poses a problem for many teachers who have created content-rich sites for their classroom.
Moving to EdWeb might just be the solution, as Ning says they will offer a 10 week grace period for users to shift content. No word yet as to what those fees will be, however.
One benefit: EdWeb was created by and for educators.