Normally I get two or three instances of trackback spam per day here. So far just today I’ve gotten about 300. I’m not the only one; chatter on the WordPress support forum and Technorati seems to indicate there’s a huge wave of it across the blogosphere.
Until yesterday I just avoided the problem by moderating all pingbacks and trackbacks. But I got so tired of having to run my eyes over all of it that I just activated the Akismet plugin. It works so well that I’ve stopped using a captcha for comments, letting Akismet handle that too. (By the way, the captcha has been almost completely effective for me–the only spam in the last year came from a couple of human spammers).
So, bravo to Automattic, the folks behind Akismet.
UPDATE May 22, 2006 Matt Mullenweg’s Akismet statistics confirm that my experience isn’t unique: blog spam (as opposed to legitimate comments, or “ham”) seems to be increasing exponentially.