Great news that we have passed the 500 mark! We could still keep pushing to 1000 if we keep distributing the link to our colleagues. This is the kind of preemptive action where the more signatures (and comments) we get from academics, the stronger the message we send to academic publications and publishers! In the meantime, a new Guardian article suggests the Chinese government may declare Cambridge University Press's uncensored articles illegal in China. See Benjamin Haas' article, "Cambridge University Press headed for showdown with China over censorship".