from NASA New Horizons Mission: The PI's Perspective: Unabashedly Onward to the Ninth Planet posted at spaceref.

"The IAU's planet definition ejects Pluto and the other dwarf planets of the solar system from the list of worlds that the IAU considers to be planets - this despite the IAU confusingly adopting the term "dwarf planet" for these worlds. Linguists, scientists and the lay public have barraged the media and the IAU with complaints about numerous aspects of the IAU planet definition. I have been involved in the debate. My conclusion is that the IAU definition is not only unworkable and unteachable, but so scientifically flawed and internally contradictory that it cannot be strongly defended against claims of scientific sloppiness, "ir-rigor," and cogent classification."

Yeap sounds like a beer inspired definition to me.

"The New Horizons project, like a growing number of the public, and many hundreds if now thousands of professional research astronomers and planetary scientists, will not recognize the IAU's planet definition resolution of Aug. 24, 2006."

"As I've said before in print, were location and context valid in biology the way that some want it to matter in planet definitions, a cowboy would become a cow when he herds his cattle."

Love that one

many other good comments as well. Enjoy.