Amongst all the easy-to-spot robot comment spam, I’m getting a bunch that (at first glance) looks like it’s written by humans. Gone are the stupid out-of-context broken-English comments and links to drug sales. These all have comments that look like they’ve got a few milliseconds’ thought put into them, all on new posts, they all leave a rediffmail (Indian GMail-type operation) address, a 209.97. IP address, and a link to a web site featuring lots of links and no content.
So far I’ve been spiteful and kept the comments but wiped the URL link.
I wonder if they’re particularly targetting WordPress sites that haven’t yet been upgraded to use the NoFollow links.