A system update for the Xbox 360 is to take place later today.

The upgrade will provide additional security support for the Wireless Adapter, including WPA2 functionality.

It will be mandatory for all Xbox Live users and take several minutes to install.

The update will not add any Facebook functionality, or restore the Sky Player that was removed yesterday.

Members currently participating in the Facebook preview will not receive the upgrade.

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So it seems it won't be greyed out anymore!

http://www.digitalspy.co.uk/gaming/news/a184141/xbox-update-to-add-wpa2-support.html