Woot!! It was actually found by two Hufflepuffers, but the congratulations goes to Angela of Hufflepuff who got her email in to me at 6:26 p.m. Pacific Standard Time! Bronwyn followed up her email shortly after at 6:43 p.m.
So, that's an extra 150 points for Hufflepuff. I'm in the middle of statistics homework that needs to be turned in tonight, so I will add up the House points tomorrow morning.