I saw on GameDev.net that the NVIDIA 9.5 SDK is now available for download. Get the goods here:
NVIDIA SDK
The NVIDIA SDK includes hundreds of code samples, effects, and helpful libraries to help you take advantage of the latest in GPU technology. The latest release includes:
  • SLI Best Practices code sample
  • Transparency Antialiasing code sample
  • GPU video and effects using shaders
  • Percentage Closer Soft Shadows effect
  • Dozens of new and updated effects for shadows, image processing, visual debugging, and more
  • Image processing code samples showing how to do convolutions, compositing, discrete cosine transforms, and more
  • Computing image histograms using occlusion queries