Make Your Own Emoticons

Problem: When sending Instant Messages, the available emoticons never seem quite right for the emotion you want to convey. For me, the one I can never seem to find is something on the order of "bemused".

Solution: I would like to see a website that takes an image of you and converts it into an emoticon, suitable for use in the common Instant Messenger applications. Then you click a button and it adds it to your current emoticon list, or at least gives you some simple instructions for how to access your new emoticon.