Xbox 360 spring dashboard update leaked?

Above, you’ll find a video, of what is supposed to be, the Xbox 360 Spring 2007 Dashboard Update, as leaked and quickly pulled by GameSpot. The video features many of the highlights of the update, some of which are the following:

• Releases May 7th.
  
• Add up to 600 Windows Live Messenger contacts to your Friends List.
  
• Text chat with up to 6 Live Messenger contacts at once during games or movies.
  
• The Marketplace will be getting its own Dashboard Blade.
  
• The Marketplace will be skinned independently of the Dashboard, for special events.
  
• The Marketplace will be getting a new, easier-to-navigate remake.
  
• Achievement Pop-ups will now display how many points and which Achievement you have gained.
  
• Low-power downloading (fans off) and auto-off after finishing queued downloads.
  
• View partially downloaded video files.

I guess we'll soon find out if these are the real features or not. The video looks pretty legit though.