Siggraph 2010: 3 New Intel DirectX11 Demos
Sample Distribution Shadow Maps
Adaptive Volumetric Shadow Maps
Deferred Rendering for Current and Future Rendering Pipelines
Learned about it from this Beyond3D thread (http://forum.beyond3d.com/showthread.php?t=58180). All 3 demos come with source code and ran fine for me on my HD5750.