I've been getting some of those stupid little comments, like “intertesting” and “none”, to some of my posts. Only, I don't think these are so random. Some of the URLs point to sites selling things like HGH, etc. I think these random comments are part of a guerilla SEO campaign. Leaving dumb little comments on popular blog sites to try and fool the SEs into ranking the sites higher. Since .TEXT turns the Sender into a link, it's pretty clever (albeit slimy).
I say we start keeping track, using munged URLs. I'll start. Today's was from humangrowthhormone [dot] com, with the sender 'hgh'. The culprit comes to us by way of 66.235.202.61.
Pitch in, maybe we can track the buggers down.
<edit>
Talk about coming late to the party!
Spammers Clog Up The Blogs (Nov 6, 2003)
Summer Project: Destroy Blog Spam (Scott Watermasysk, May 22, 2004)
May I suggest a CAPTCHA image?
In the meantime, delete.
<edit>
Here's another one:
Sender= (two asian characters)
Message = doom and ID Software
IP = 61.145.232.36
URL = www [dot] 18show [dot] cn