um, u wouldnt be using a touchpad in flash... you would be using vector style images, in the style of many of the flash cartoons out there... this makes it much easier to manipulate and make things move into different shapes...
ie, u can draw a big circle and have it morph into a square over a timeline in just a few clicks.
thats a simple example but shows what can be possible...
if u have time i recommend you download flash mx or whatever the latest incarnation is and have a play around
