Whom. This terrible word gets my goat almost as much as "albeit." Unless it's the object of a preposition, it should never be used, ever. Even then, just rejig the sentence. Constructions such as "to whom it may concern" (which is horrible in itself) are the only ones in which "whom" is barely acceptable. I wish "whom" an early and horrible demise. I think I may have used it here once but (in the words of Basil Fawlty) I think I got away with it...