Owen Good of Kotaku writes:
"This is what the news biz calls an "incremental development," but when it involves a game as highly anticipated as Modern Warfare 2, people notice. Yesterday, folks who'd friended some Infinity Ward types saw them playing it on Xbox Live.
Playing an unreleased title on Xbox Live is typically an indicator the game has been moved out of development on Microsoft's PartnerNet, and has moved into the certification process."