Image used for representational purposes only.
Express yourself: With the new Xbox 360 experience, gamers can personalize their entertainment like never before. They can create their own avatar, designed exclusively by Rare Ltd., and jump into a party with friends from around the world.Entertainment without limits: With LIVE Party, bring your favorite games, TV shows, movies and pictures to life by sharing those experiences with friends, wherever they are around the world.
The new game show: The new Xbox LIVE channel Xbox LIVE Primetime represents an all-new way to play. A collection of virtual game shows such as “1 vs. 100,” Xbox LIVE Primetime allows thousands of gamers to become contestants from their living rooms, playing together simultaneously, live with content that is always fresh and relevant.
Expect more information and screenshots to release soon.
It is a Mii. The image is used for representational purposes only; dunno why that didn't show up the first time round. 
