These guys in Germany built a 3D facial reference model out of some 200 faces (watch the video at Wired) then used it to extrapolate 3D face model out of 2D photos. Since the reference model includes facial expressions and variations, resulting models can be changed to add weight, age, and even smiles. Wow. Face morphing application alone could be very useful but 2D to morphable 3D face modeling is just fantastic.