Check out this. Its so freaky:
Look at the video on the top right for an example of what the program does.
From any image of you for example, it can make you talk and say anything. Its so clever with the way it does it.
You first load the picture, and then select where your eyes and mouth are. You then sculpt using simple wireframe your eyes and mouth shape, and then press okay.
Your face, shoulders then can move, and you can add sound (and record), and it'll lip sync whats being said.
I was so shocked when I first saw it. It has a weird belivablity about it, and even looks somewhat 3D.