"Downsizing Pluto" by Shane Halbach appeared in Daily Science Fiction on January 7, 2013. "Hades gets a pink slip from Zeus."
The author notes the obvious--that his story was inspired by the recent downgrade by astronomers of Pluto from planet to dwarf planet. I enjoyed the witty banter between the personified ex-planet Pluto aka Hades and his boss Jupiter aka Zeus. Entertaining if predictable. 5 out of 7 rocket-dragons.