As with a few other sites that I manage, the subscriber option has not worked the way it was intended.  Additionally, there are many who have subscribed only to hammer away at the site to see if they might break in and spam the whole thing to death.  That said, I regret that I must shut down the subscriber option for now.  If you wish to receive updates you can contact me directly and I will put your e-mail address on a secret list and blind-courtesy-copy you each time something new happens.  I apologize for any inconvenience.