I saw this @ X-Bit Labs.
This is what they said:
Well, finally happened the thing, which have all know about since the end of 2000: Socket423 (for Pentium 4 CPUs) left this sinful earth having hardly lasted for a year and a half (the first mPGA423 processor was launched on November 20, 2000, and active life of Socket423 was over about 6 months ago). Click on Read More... for more information. Click here if you wanna read more about it.