All I've seen is the following blurb:
http://arstechnica.com/business/news/2010/03/intel-goes-to-gulftown-launches-6-core-xeons.ars
Embedded, Gulftown, and new Macs
In addition to the 5600 series, Intel is also offering a number of "embedded" Xeon partsi.e., parts with extended lifecycle support that are intended to go into high-performance appliance-type applications.
The Core i7-980X Extreme Edition, codenamed Gulftown, is also launching today. Gulftown was previewed at this past GDC, and it will definitely make some gamers very happy. It should also delight Mac Pro users, who've been waiting a year for Apple's towers to be updated. Gulftown will go into the single-socket Mac Pro, and two six-core 5600 parts will go into the two-socket towers, brining the core count up to 12 in Apple's highest-end machine.
http://arstechnica.com/business/news/2010/03/intel-goes-to-gulftown-launches-6-core-xeons.ars