As promised, Microsoft is bringing some early gifts to your Xbox 360® just prior to the holiday season. Beginning at 0200 A.M. PST on December 4, 2007, the Xbox 360 Fall Dashboard Update will be available for all connected Xbox 360 consoles free of charge, bringing an array of new features and enhancements to the leading gaming and entertainment system.
Among the key new enhancements are the previously announced Xbox Originals game download service, Family Timer parental control feature, and expanded social networking experiences. Xbox 360 owners can also look forward to enhanced navigation, profile, and video features and Xbox LIVE® Arcade Hits.
This free update will be digitally distributed over Xbox LIVE to the more than eight million Xbox LIVE members worldwide (Xbox LIVE Silver and Gold) with no disc or hard drive required. If you don't have an Xbox LIVE account, you can easily sign up for the free network by connecting your console to a broadband internet connection.
See the first link at the Alternative Sources below for even more details from Microsoft.