Note, both threads are now in the Making Stuff Together section. (Maybe a mod moved one?) The duplicate should probably be deleted.
Anyway, I don’t have any experience w/ a PSP thumbstick. How do they compare to IBM trackpoints? How do they compare to the thumbsticks from other video game controllers? (e.g. how much space do they take up, how much force do they need, how easy are they to control, what kind of resolution do they usefully have?) Is it a couple of potentiometers in there, or some other kind of mechanism?