4. A computer-implemented method as in claim 3 , wherein the steps of providing one or more cues, receiving from the first plurality of untrained providers images created in response to the step of providing one or more cues, sending requests to rate the images to a second plurality of untrained providers, receiving ratings of the second plurality of untrained providers, and receiving ratings of the second plurality of untrained providers are performed by a computer-based system over a network coupling the computer-based system to provider machines of the providers of the first and second pluralities of untrained providers.
4. A computer-implemented method as in claim 3 , wherein the steps of providing one or more cues, receiving from the first plurality of untrained providers images created in response to the step of providing one or more cues, sending requests to rate the images to a second plurality of untrained providers, receiving ratings of the second plurality of untrained providers, and receiving ratings of the second plurality of untrained providers are performed by a computer-based system over a network coupling the computer-based system to provider machines of the providers of the first and second pluralities of untrained providers. 8. A computer-implemented method as in claim 4 , wherein the step of using the classifier comprises using the classifier to allow a user to self-train in creating the predetermined expression, wherein the classifier is employed to rate a picture of the user for appearance of the predetermined expression.