I'm developing some simple as3 api in order to quickly use any flash projects on a multitouch system. It allows me to easily create objects that react to common multitouch actions (click/tap, drag, scale and rotate). Objects can be assigned to 'listen' to any combination of mt actions (i.e. some objects can be only draggable, while others can be rotatable and scable, etc... ). Actions can also be assigned to be triggered by any specific number of fingers (i.e. draggable by 4 fingers instead of one and rotatable with 3 fingers instead of two, etc..)
It uses TUIO protocol (via this Flash AS3 TUIO Client/api - bubblebird.at/tuioflash/ ) and therefore can receive messages from several available multitouch systems (i.e. CCV, reacTIVision + TUIO simulator, multitouch apps on the iPhone, ...).
I took this opportunity to have a look at the as3 HYPE framework [ hype.joshuadavis.com/ ]. For this video/test I plugged the 'adjuster' example [included in the HYPE framework download] to my multitouch setup.
My as3 api and multitouch table are works in progress and are not yet bug free.
Flash AS3 TUIO Client - tuio.org/?flash (svn - code.google.com/p/tuio-as3/ )
Udp flashlc bridge - gkaindl.com/software/udp-flashlc-bridge
PS: At the same time, I am doing a similar addon for openFrameworks using ofxTuioWrapper and other addons. It is named ofxMultitouchActions and I will soon put it online.