Out of curiosity I've taken a look at what kind of spam is now getting through our automated defenses. I did a little digging and confirmed a long held suspicion.
In a nutshell, I've caught a 100% human spammer and thus verified that indeed there are people in China who's job it is to post comment spam on random websites.
The attack came from 18.104.22.168, a Chinese IP.
On Jan 12th 8:53:02 he first came to our site from Google. He was searching for:
"post new comment Create new account site:.org"