If you’re a blogger you may have noticed spammers have figured out a way around us blocking them by keyword, don’t use keywords.
Most of the new spam looks like a real comment until you look at the person commentings link or the links in the body of the comment. Almost all the time it points back at a spam site or a bulletin board that is actually redirecting to a spam site.
Nice trick. Unfortunately for you (and fortunately for us) you haven’t realized that all your links still have “nofollow” tags on them so the search engines ignore your links. Sorry. We still win.