The STM32F103VBT6 is the backbone of the Playstation Move. It combines a 72MHz ARM Cortex-M3 with a boatload of peripherals. While it's not the most powerful of the available Cortex-M3 designs on the market, and pales in face of the new Cortex-M4, it is a very nice chip at a very nice price. Thats probably why Sony chose it for mass production.
There’s an 8MHz crystal that feeds the STM32’s PLL.
Table of notable pins
STM32F103 data sheet
STM32 Programming reference manual
Check out the firmware post for more information.