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Power Member
Shacknews has confirmed that Xbox Live Silver members are now able to play some Xbox 360 games online, a feature once reserved for paying Gold subscribers.
Currently, only three titles allow free online play: Universe at War, Shadowrun and Lost Planet: Colonies Edition. Other games, such as Call of Duty 4 and Gears of War, still require an Xbox Live Gold subscription for online multiplayer.
http://www.shacknews.com/onearticle.x/53886