Seeing as how, thanks to Kyosen, etc, the Dothan has been getting a lot of attention. However, I happened to find this on Endian.net about the Dothan's successor:

Intel's Yonah: Mobile chip, succeeding Dothan in the power optimized notebook segment including HyperThreading. Will use the Alviso-GM chipset. Believed to be designed around two Dothan cores, each with 2MB of cache. Earlier listed as a 90nm chip in 04-H2.
Yonah (sometimes referred to as Jonah) is part of the Napa Centrino platform, succeeding Sonoma.
Coming out in Q1, 2006 -> YES !! TWO DOTHANs on one chip -

Though it is confirmed to be a 65nm chip.

The Inq has these articles to add:

Intel's Yonah: a dual core thin and light Pentium M

Intel shows off dual core Pentium Ms

I guess Intel's answer to the Athlon 2500+ Mobile came "better late than never" in the Dothan