The Max Planck Society and Springer have announced their successful negotiations for an arrangement that provides the Max Planck Society with access to Springer journals, and free access to Max Planck authors for the Springer "Open Choice" option. For details on the press release, see here.
In my view, this is an important innovation and a model that others might wish to consider for the process of Transitioning to Open Access.
Thanks to Peter Suber on Open Access News; please see his post for Peter's comments.