I've seen it linked all over the place this morning: the 101 Dumbest Business Moves of 2003. Some true hilarity here.
My favorite stupid-business move of all time, incidentally, came back in 1997, by the company I worked for at the time: Pizza Hut. (It was probably a franchisee, actually, but still.) The Pizza Huts in Maryland decided to offer, as a Monday special, $1.00 off for every sack the Baltimore Ravens had against whatever opponent they faced the day before. This was a fairly safe thing at the time, since this was a few years before the Ravens' defense became really good -- or so they thought.