Taito’s Egret Mini II Console has an optional joystick, and it’s a modern wonder. New and excellent mechanism, and solid construction.
A brief hardware post talking about arcade joysticks from Sanwa, Seimitsu and Hori.
I’ve put together a page on the Anatomy of a Joystick, the first in a series of articles about controls (I hope!). Enjoy, and let me know if there’s anything that might need to be changed.