When I woke up this morning there were 9 planets. Now for the first time since 1930, we're back to 8. Pluto is officially a "pluton" or a "dwarf planet" and will form the basis for a classification of Trans Neptunian Objects.
UPDATE: Yup, we lost a planet. Obviously all Bush's fault. I suppose I should add a science category or something one of these days. But I'm sure the decision was at least partly political (in the same way business decisions can be) so this category will do for now.