I had been getting a veritable cornucopia of spam from a particular range of IP addresses (18.104.22.168 through 153). After getting fed up with the strange, hash-like comment spam, which askimet was initially missing, I googled for the address and found this brilliant post detailing someone else’s experience of the same problem and an explanation of how to fight back; it actually also included a host of “me too” comments, as it seems this may be a case of a new spam tool being tested before full deployment!
I have now added a .htaccess file to block everything emanating from 192.102.60.* and having read this follow up post to the original explanation, plan to install the Honeypot plugin too.
Post tune: Wu-Tang Clan, Triumph, Legend of the Wu-Tang