I have to say that I'm glad that this didn't happen whilst Clyde Tombaugh, one of my childhood heroes, was still alive: it would bite to have spent your life as the discoverer of the 9th planet only to have it revoked during your golden years.
Also, has anyone noticed that the third part of the new definition of a planet, that part which solely disqualifies Pluto – that the designated planet "has cleared the neighbourhood around its orbit" (and which seems somewhat arguable to me as it seems fuzzy regarding double planet systems or assumes all stellar systems to be as "clean" as ours) – absolutely invites Pluto to destroy Neptune and thus regain planetary status? Is this the kind of behaviour we want to reward in our solar system? Is it?!