Yep, it happened to us as well, and it was just a matter of time. Somebody must be reading these posts because we got a post from some guy named Rodrigo, who may or may not speak Portuguese and is obviously a huge spammer. I've heard of programs that scan websites with open comments and automatically sends a form post; in essence another spam technique.
Still and all, it may mean that somebody actually is lurking about. I just know it wasn't any of my Bronx Banter bredren, so... I'm just sayin' >;)