This AMD press release officially announces their new version of their Opteron server processor, but of even more interest is that AMD has it has completed "the design, or tape-out, of its native Quad-Core AMD Opteron processors," which should be released in mid-2007:

Quad-Core AMD Opteron processors are expected to be electrical-, thermal- and socket-compatible with the Next-Generation AMD Opteron processors introduced today. This long-term approach means AMD customers can benefit from a consistent and common architecture that scales to meet changing needs and escalating demands, and from the ability to select quad-core ready platforms today. The consistency and stability offered by Next-Generation AMD Opteron processors also enhance the potential benefits to OEMs, system-builders and semiconductor companies who elect to innovate on the AMD64 architecture via the AMD Torrenza initiative. Torrenza capitalizes on the Direct Connect Architecture and HyperTransport technology advantages of the AMD64 architecture to enable other processor and hardware providers to innovate within a common ecosystem. The enhanced capabilities and innovation options now available through the extensible system bus via the HTX connector with new AMD Socket F (1207) compatible processors serve as the infrastructural underpinnings for advancing AMD64 as the x86 open innovation platform.