That's what FSJ thought. But apparently, the link was sent to him by the guys at Sitening (who also created the Haiku site as a lark), and the link he was sent was a specially created link, made up just for FSJ by the Sitening guys. See where this is going? When he clicked the link, they tracked his IP, and here it is: 126.96.36.199. That IP traces back to a Verizon service, which the Sitening guys say is in Boston, MA.
And then the story gets even stranger. Diego Barros at the Radio Active Code Blog posted a comment on FSJ's post about the tricksey linkses, and then the post itself was removed completely. FSJ usually seems pretty easygoing about this stuff, so the fact that he actually took it down gives credence to Barros' suggestion that FSJ is on the run.
So who does all this point to? So far, this evidence all says Andy Ihnatko, who lives near Boston, has written for both MacWorld and Playboy, and has worked anonymously before-- apparently he wrote parts of Roger Ebert's movie guides. TUAW dropped him a note asking him about the rumors, and we'll let you know if we hear anything back.