The Inquirer reports Intel will launch the last NetBurst based processor on December 27th.
Q1 2006 will see the launch of regular single and dual core Preslers. Difference between 65nm produced Pentium D and Extreme Edition versions are the 800 MHz FSB on the former and 1066 MHz FSB on the latter. Desktop Preslers will be known as Pentium D 920, 930, 940 and 950. All Preslers support iAMD64, Virtualization Technology and La Grande architecture, as a part of grand TCPA scheme. For La Grande to work, you need a TCPA chip on the mobo, so you're safe until you get a TCPA-chipped' mobo.
The Presler core should hold the candle until Conroe hits the big scene somewhere during back-to-school period.