I thought "nofollow" meant "hey search engines, don't pay any attention to the links on this page because they're probably just blog comment spam." Anyway, I was using Site Explorer on some of my competition to see how many links they have, and I was checking some of them out. Guess what? All of the links that came from blog comments were on "nofollow" pages. If search engines ignore "nofollow," then why are they showing up on a backlink checker?