grant skinner has done this already and I tried it before, but got lost. I wanted a solution where the displacement output is rendered onto the source image. This would be more fluid, cause you could move pixels endless in the bitmap. But after grants post, I tried another solution, which appears to be the same as grants one. here is the source to play with.
After posting this into the german flashforum board, gerald van den elzen modifies the application to take snapshots from your webcam and gooify it. Furthermore you can save it to the server ! Foolish stuff :)