In last week’s edition of these rankings, the headline read “Ohio State and Michigan State emerge as the cream of the crop.” Well, the Spartans don’t look as invincible now as they did a week ago, and the Buckeyes aren’t exactly blowing away the rest of their competition. Both division races remain wide-open, with seven teams still very much in conference championship contention and many burning questions yet to be answered. Can Purdue stay hot? Is this the year Jim Harbaugh finally has a successful November?