Bleacher Report story tells it all: Perfectly Flawed: Jim Joyce Robs Armando Galarraga, Tigers of Perfect Game
Join the Facebook page to see if this injustice (in pro sports, mind you) can be righted and / or video replay can finally be used in MLB:
http://www.facebook.com/pages/Galarraga-got-robbed/122089564495820?ref=search&sid=RifkLfvu9Mox_MtvZvYjCg.3560830506..1&v=wall