There is really neat Nehalem article in Anandtech:
http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3382&p=1
http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3382&p=1
Three Core i7 branded Nehalem parts, one at 2.66GHz, one at 2.93GHz and one at 3.2GHz - all with the same 8MB L3 cache and all quad-core. There is no conventional FSB, but all of these chips run off of a 133MHz source clock.