In what I think is a major public relations coup a committee of The International Astronomical Union has decided to call these newly-discovered Pluto-sized asteroids "Plutoids".
You'll recall that a couple of years ago the same union of astronomers voted to strip Pluto of its status as a planet and call it a Trans-Neptunian Dwarf Planet, as reported in my blog entry at
http://daltonhammond.blogspot.com/2006/09/is-pluto-planet.html
By naming all these other critters Plutoids the committee has raised little Pluto's esteem by naming a whole new asteroid classification after the former planet.
I'm so glad.
-- Dalton Hammond