Dwarf planet actually. The fourth to be classified as such and the first one after the controversial 2006 IAU decission that defined the terms planet and dwarf planet.
The new dwarf planet was known as 2005 FY9 or, more colloquially, Easterbunny. It has been apparently this nickname what brough Mike Brown to choose the new oficial name of Makemake, the link being the Eastern Island, where Makemake used to be the god that created humankind.
In July 19th the IAU made this "upgrade" of the KBO official.