I know why Pluto is no longer a planet! They want to make every astronomy textbook outdated! If that is indeed the case, I must say that it was a heck of a prank.

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Why wasn't Neptune disqualified???
Neptune has a fairly normal orbit along the ecliptic. Pluto's orbit is significantly tilted and has a bit more of a difference between its aphelion and perihelion (it's more elliptical than the other planets). Its perihelion (where it is closest to the sun) is closer to the sun than Neptune's semimajor axis, and it is therefore within Neptune's orbit for a certain length of its year. This is similar to the orbits of comets.
Just a little extra to add, I believe that the tilt of Pluto's orbit makes it impossible for a collision between the two planets, err... objects. Sorry Goto, we'll need to find another way to set things right in the cosmos.

Awww... Back to the drawing board I guess.

What about hollowing Pluto out and turning it into a Death Star?