Software packages like mathematica permit the dynamic manipulation of a simple 2D graph parameters, while at the same time the graph gets updated. I know there is a sequence object with which you can track of a curve change over a refference slider, but having those sliders to adjust graph characteristics while sliding the slider (without clicking "Simulate") would be really nice.

I am thinking this would just be another rappture object you can grab ("slider"), and have a corresponding "updatable curve" as a rappture object. This object might hold a precalculated version of every frame so that fast rate updating is possible...

Something like that...