Intel is preparing to introduce a six-core chip called the Dunnington. This six-core Dunnington microprocessor will use three dual core 45 nanometre Penryn processors with a shared 16MB L3 cache. It will be succeeded by Nehalem micro-architecture, which will support greater than eight cores. The project itself is still under wraps so no word on availability as yet. Source :- Eclipse

The dingus, which Intel has previously described as pin-compatible with the dual-core/four-socket Tigerton quad, will be two- and four-socket, meaning mainframe-like machines with 24 cores