DailyTech - "Nehalem" Taped-out and Running Windows Intel's Nehalem to feature eight cores, 16 threads - The Tech Report
Nehalem will integrate a high-performance memory controller and a new chip-to-chip interconnect known as QuickPath
Nehalem is going to have Hyper-Threading technology as well. So this means that eight-core Nehalem processor will appear as 16 logical cores to the operating system
Nehalem will pack eight CPU cores onto a single die