The new ATI stream SDK includes a CPU implementation of OpenCL.
AMD released a demo of a 2d fluid simulation using 24 cores.
I have to say, I'm not very impressed. I'd be keen to see how this holds up to an OpenCL GPU implemetnation, it certainly seems like CUDA has a strong position for now. They do have a good OpenCL introductory tutorial though.
In other news, nVidia released OptiX a realtime raytracing "engine", whatever that is supposed to mean..
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