About joystick control, this appears to be fully supported. Steering, rudder
and throttle all work along with the hat switch and various buttons. There is also mouselook
in the cockpit view.
I don't think there's any additional support for advanced joysticks though.

The control surfaces are animated on the aircraft (unlike Wings of Honour I think)
and the instruments in the cockpit (control column, pedals, gauges) also move.

I'll see if I can grab some screenshots later.