In October at “Eco-Nehalem” briefing in San Francisco , intel has presented the new family of quad core processor code name Nehalem.
Some specification of this processor :

Quad-core
731 million transistors (incredible !!!)
45nm process technology.
ovviamente 64bit
2.66 GHz to 3.2 GHz
Core Name: Bloomfield
Socket B (LGA 1366)
8MB 3rd Level Cache
Hyper-threading technology, or also known as Simultaneous Multi-Threading
New [...]