Yes, Yorkfield has hit, & Penryn's are around the corner, but don't forget about Itanium. Intel's rolling out a new line of these server chips, & they're dual-core to boot.

"The 9100 series features clock speeds of up to 1.66GHz and 667MHz FSB within a 104W power envelope. A three-load bus – two processors and a chipset on the same bus – provides increased bandwidth for enterprise and high-performance computing tasks."