Due to the increasing abuse of the master blacklist file on Jay Allen's server, culminating in its being hit 2.4 million times over a 4 day period, MT-Blacklist and the master blacklist are now dead and won't be coming back.
Thank you, Jay, for providing MT-Blacklist when it was needed most and putting everything you did into it to keep it working for as long as you did.
P.S. 2.4 million hits isn't a quarter of a billion, but it's still a helluva lot. ;)