FutureMark has released a demonstration video of the soon-to-be-released 3DMark 11. This video is of the Deep Sea build of 3DMark11 and demonstrates DirectX 11 technologies. Unfortunately, There are no plans to release the Deep Sea tech demo to the public.
Deep Sea is a demonstration of DirectX 11 technologies created using an early development build of the 3DMark 11 engine. 3DMark 11 will be released in the third quarter of 2010. There will be a free edition that allows unlimited runs available at launch.