The system on the beloved Tiger is called differential ailerons. It's beautifully simple - the aileron control rod from wing to aileron is mounted on a plate that rotates in the horizontal plane with stick deflection. It can be easily imagined that where the rod attaches to the plate controls deflection and, yes, it does reverse the downgoing aileron at large stick deflections. Still need feet though!!!
BTW One of the reasons big jets tend to use spoilers for roll control is to counter this effect.
[This message has been edited by mustafagander (edited 02 October 2000).]