This could get silly, but some sort of game controller might be a good start. It might be worth looking at how Poser camera controls could be linked to a USB HID (which is, I think, a Human Interface Device.) I'm badly out of touch with this, not having spent much money since the days of Thrustmaster programmable joysticks. In my case, it was a Tornado GR1 simulator, flying oveer the desert at 600 knots while trying not to scrape the paint off the wing-tips in turns. Neither this not the popular F-16 would be a suitable model for controlling a Poser camera, but if Poser can be hooked up to that sort of input, it might be useful for some jobs. (Googles a bit) They all seem similar--a multidirection control under the left thumb and a lot of buttons. Only 8 directions it seems, rather than full analogue, but that and some buttons as shift-keys might work better than the keyboard.