Are any of those cartoonyourself sites open sourced?
If they are then we can grab the code and have a look into it
There is still a major difference though, especially here:
If I am not wrong, those avatars are 2D aren't they? Please do correct me if I am wrong.upload a pic of his and have him/her avatarized for da game.
La Vida is currently a 3D game, which is why I likened the possibility of creating a realistic avatar to the game Perfect World. It implements using the players image to help create a look-alike avatar. It's really not easy to be done though...since it's in 3 dimensions. It is very different from those cartoonyourself sites.
If you know of an opensource one, please share it here
My knowledge is not perfect, but I do think that I put up some valid points.