We have a spammer, ladies and gentlemen, and they're going after bloggers. Virtuelvis, Masukomi, Beerblog, Bingwalker, Falcon's Eye, Mentalspace, Uppity Negro, Library Planet, Bill Kearney and Dale Keiger have all encountered the same company spamming their blog comments in the past day: Zipcodeworld.com.
The comment invariably reads "nice article, keep up the good work. lookup zip code" and Bill says the IP is 203.106.151.137 - keep an eye out, folks, and ban that IP.
The above post by Ben Hammersley pointed out a feature of Movable Type that I was unfamiliar with: IP Banning... Under the Blog Config area of Movable Type, one can enter the IP number of a host you which to ban from entering comments. One other thing I am noticing is that the address I use on several of my weblogs is starting to be spammed. I got a piece of mail this morning which was addressed to that particular address and noticed that Al Delgado was also listed as an addressee. A bit too much of an coincidence...