AMD has released a new ATI Stream SDK this morning and, among other improvements, it features OpenCL 1.1
support. The OpenCL 1.1 specification was released by the Khronos Group back in June as the first major update to the Open Computing Language since it's original draft in 2008.
OpenCL 1.1 delivered on support for three new data types, the ability to handle commands from multiple hosts and processing buffers across multiple devices, enhanced use of events to drive and control command execution, more OpenCL C built-in functions, and improved OpenGL interoperability.
Besides ATI Stream SDK v2.2 implementing the OpenCL 1.1 specification, the 2.2 release features support for Ubuntu 10.04 and Red Hat Enterprise Linux 5.5, SSE3.x and later CPU support, support for single-channel OpenCL image format, the capability to generate and load binary OpenCL kernels, support for native OpenCL kernels, and other optimizations.
The ATM Stream SDK v2.2 for Linux and Windows can be found in the AMD Developer Area