Xbox 360 owners got a bit of a surprise today when they found that not only were the two new multiplayer maps available as promised, but a free Gears of War dashboard theme was available for download as well. The theme is based on Raven Down and Old Bones, the maps made available by Epic today and is being provided courtesy of The Discovery Channel's new show, Future Weapons. Microsoft hasn't commented on how long the theme will be available, so my advice is to download it fast before it vanishes forever.
In addition, a video introduction to Raven Down and Old Bones, featuring none other than Gears lead designer Cliff "CliffyB" Bleszinski, was made available for download in the marketplace as well. Be sure to check it out.