Nvidia have released to public the CUDA Toolkit 3.0.
I will not list all the Highlight.... they list because is too long.
But the most important point (related to image processing and OpenGL application are the following points) Support for all the OpenCL features in the latest R195.39 beta driver:
OpenGL Interoperability, for interactive high performance visualization
OpenCL Images support, for better/faster image filtering
32-bit Atomics for fast, convenient data manipulation
Byte Addressable Stores, for faster video/image processing and compression algorithms
Support for the latest OpenCL spec revision 48 and latest official Khronos OpenCL headers as of 11/1/2009