AMD has released the ATI Stream SDK 2.0 beta with OpenCL 1.0 support for developers, this new edition supports both the GPU and CPU. More details at AMD.
ATI Stream technology is a set of advanced hardware and software technologies that enable AMD graphics processors (GPU), working in concert with the system’s central processor (CPU), to accelerate many applications beyond just graphics. This enables better balanced platforms capable of running demanding computing tasks faster than ever.
The ATI Stream Software Development Kit (SDK) is a complete development platform created by AMD to allow you to quickly and easily develop applications accelerated by ATI Stream technology. The SDK allows you to develop your applications in a high-level language, OpenCL™ (Open Computing Language).