i was not absolutely happy with MT-Blacklist up to now, because i still get some comment from day to day.
but today i looked at my blog’ activity log (if you run MT: /yourblog/mt.cgi?__mode=view_log ) and was quite astounded that my MT-Blacklist actually stops at least two spammers per day (!!!) from promoting their shabby site on my blog (and upping their ante in the google-page-ranks (as discussed by b.))
now i just updated my blacklist with the master-blacklist and am happy that jay allen protects me from the scum on the intaweb!
Wow, I had installed it, but never thought to look at the log, you are right, it blocks about 2 to 5 a day. This thing is pretty cool.