To correct everyone in this forum that is confused about the next Intel mobile platform, and to stop the mislabeling of technologies. The next generation Centrio platform is "Napa" and this will be the third generation of Centrino, "Sonoma" is what Intel just released January 21st - the second generation, and "Carmel" was the first generation of the Centrino platform.
What is Yonah you ask? Yonah is a 65nm, dual core chip, that will replace Dothan in the Pentium M line up. Yonah will be clocked at 2.67GHz, running at 667MHz FSB, have 2MB of shared L2 Cache, and consume 31 watts of power. Yonah will not have EM64T right out of the gate, but will feature VT (Virtualisation Technology) and AMT (Active Management Technology). Their is a slight chance (under 10%) Yonah will get EM64T towards Q4 of 2006, but Intel has officaly confirmed that "Merom", the chip succeeding "Yonah" will have full EM64T support.
The break down the third generation Centrino platform "Napa" goes as followed:
The third generation Centrino platform "Napa" will be released in Q1 of 2006, despite any Q4 2005 rumors. You won't see Calistoga, Yonah, or Golan released separately in late 2005, as some of you belive. Their won't be a "Centrio 2", it will still be called "Centrino" but will be the 3rd generation of the Centrino family.
I hope this helps solve the confusion around hear about what Centrino is, what generation it's on, and whats going to happen during the next year. If you have any questions, please feel free to ask away.