Wouter J. Hanegraaff, professor and coordinator of the History of Hermetic Philosophy and Related Currents program at the University of Amsterdam has created a new blog specifically for the situation at the Ritman Library. The first post contains a list of academics who have signed the petition (I posted something similar yesterday) This will likely be the place to follow the situation as it continues to unfold.
Follow it at The Ritman Library Must Be Preserved. Spread the word.