Microsoft mouthpiece Major Nelson sends word that a mandatory Xbox 360 update is set to land today, preparing consoles for the arrival of Facebook, Twitter and Last.FM features on Xbox Live.
"Sometime over the next few hours when you sign in to Xbox LIVE you'll receive a prompt to accept this mandatory update," says the Major. "If you are signed into LIVE already, you may be signed out and asked to accept the update and you'll be back online in a few moments.
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"There are no new features or changes in this update. This update is preparation for additional system enhancements (Facebook/Twitter/Last.FM) that will arrive later this year."
As you can see the Xbox 360 social network functionality doesn't have a solid release date yet, though Microsoft's said that it will probably "spread out" the launches later this year.