I guess the most difficult issue in making avatars is to get them look good. I mean, it's no big issue to make them but to make something out of a large image that it works well when cropped and re-sized. I don't also get the point when many people have KK's picture as their avatar. It would be cool if people could make something from scrap or make a commission for someone who can do these things. I for one am a Visual Design student but not sure how much time I have to make these things. But like Mandy said earlier it really takes only couple of minutes to make an avatar from a picture that can be found on the net. Original pictures take quite a lot of time.
Always dream and shoot higher than you know you can do. Don't bother just to be better than your contemporaries or predecessors. Try to be better than yourself.
-- William Faulkner