I was at a used bookstore yesterday and they usually have a lot of Simpsons DVD box sets and they had sold all of the used 3rd season box sets probably because the day before yesterday is the date Michael Jackson would've celebrated his 64th birthday.
I'll bet these cycles will keep going on every August 29th until "Stark Raving Dad" gets put back in rotation. (My guess is it will be because of people using the DVD'S to make bootleg copies of the episode.)