2007 Intel Bloomfield Inte x86 processor with "Cores-a-plenty"™...
2008 Intel Bloomfield Quad-core chip on one die built in the 45 nm process. Released on or after 2008.
2008 Intel Nehalem Nehalem was a new design built using a 65 nm process with half the die size of a Northwood. Was supposed to use a 1200 MHz (or a 4 GHz bus as some rumours claim) bus and start at 9.60 GHz before continuing to 10 GHz+.
Nehalem is now changed to be the name of the family succeeding Merom, Conroe and Woodcrest, which is 45nm and will include Whitefield, Gainstown and Bloomfield. The Nehalem platform will use the Tylersburg chipset