NYT columnist David Brooks likes to explain any situation as a split between two different types of people. Given this, I think he should write a column that begins:

  There are two kinds of people in the world. Those who love Harry Potter, and those who think Harry Potter is silly. I call them the Potters and the Notters.

  Meanwhile, Heidi Bond, whose blog is presently the #1 google hit for "Horcrux," has found Potterblogging to be an easy way to run up 680 blog comments in about a day.