Well, it only took two years and almost 200 posts, but I finally got my first spam comment. (At least, the first one to make it past Blogger's spam filter.)
I deleted the comment, but just so no one feels cheated I'll include it below. At 1:30 this morning from a server located in India "sell house fast" left the following comment on an eight month old post - "Hi, thanks for posting this i am looking for improve my home."
Ah, I feel like a real blogger now.