Banias
The first Pentium M was recognized by the codename "Banias". It was manufactured on a 130 nanometer process and was released at frequencies from 1.3-1.7 GHz using a quad-pumped 100 MHz FSB, and possessed a 1 MB L2 cache.
Dothan
Dothan an improved Pentium M processors (with 140 million transistors) was released in May, 2004. Its mainstream versions are known as Pentium M 715 (1.5 GHz), 725 (1.6 GHz), 735 (1.7 GHz), 745 (1.8 GHz), 755 (2.0 GHz), and 765 (2.1 GHz). The 700 series Pentium M processors have the same basic design as the original Pentium M but are manufactured on a 90 nm process.
Yonah
Yonah, introduced in mid September 2004, is a dual-core design targeted for manufacturing on a 65 nm process. This will be Intel's first dual-core processor designed from scratch. It contains two cores based on the Banias/Dothan micro-architecture, a 2MB L2 cache that'll be shared by both cores, and an arbiter bus that controls L2 cache and FSB access. A single core version of this will be marketed under the Celeron M brand.
