I had an email last week from NVIDIA that they have submitted their OpenCL 1.0 drivers for Windows and Linux to the Khronos OpenCL Working Group for certification. From that email:
NVIDIA was the first to provide pre-release drivers to its OpenCL Early Access Program participants in April 2009. NVIDIA remains the only vendor today with software and hardware available for developers to program with OpenCL as well as other GPU Computing environments including DirectX Compute, C with CUDA extensions and other languages.
NVIDIA’s OpenCL 1.0 drivers will support all GPU’s based on the CUDA architecture (http://www.nvidia.com/object/cuda_learn_products.html)
To apply to become a GPU Computing registered developer or for more information on NVIDIA’s support for OpenCL visit www.nvidia.com/opencl