Yes, the Miliband brothers are working together again, on a project initially set up by David M to recruit a thousand "community organisers" to resist the changes introduced by the coalition government and introduce their own changes. At least that's what this (somewhat isolated) Guardian article says.
The project is in reality aimed at bringing Labour back into government, and that is openly stated; but it looks like it will no doubt turn out to be yet another carefully dressed-up sleeper body that will one day be called upon to engage in full-scale subversion. That would be consistent with every other such initiative by Labour that involves what might loosely be termed outsiders, i.e. not the party hard core.
So, watch out for this Movement for Change, and be aware of who is behind it and its ultimate goals.