I was investigating some other avatar creation tech and dropped into Gizmoz.
Increasingly there seems to be simple yet accurate ways to capture and model faces. In this case a single photo was enough to generate this image.

Of course whether we choose to represent our real faces, versions of us adjusted, or some much more abstract rendition in various places online is both personal preference and context.
Gizmoz seems like a lite version of Crazy Talk which incidently got a good few mentions on this weeks dogearnation podcast.