"The Precise Date" Justice Stevens "Plans to Retire":
ABC News Jan Crawford Greenburg, author of a forthcoming book on the Supreme Court, told Howard Bashman that Justice Stevens told her "the precise date he plans to retire." For whatever reason, this claim has not received more attention or engendered greater uninformed speculation.
UPDATE: Yes, this is probably a joke . . . but that sort of thing has never prevented uninformed speculation before.