The Elder Scrolls IV: Oblivion Shivering Isles is now available on Xbox Live Marketplace. For a hefty 2400 Microsoft Points you'll nab yourself an equally hefty chunk of Oblivion content. The 30+ hours of gameplay weighs in at 993.75 MB. You'll also have 10 additional Achievements that you can unlock in the new world. Of course you have the choice of using your current character, or creating a new character specifically for the expansion. So what are you waiting for, go grab it now!