In addition there is this lovely video featuring animator Joanna Quinn. I think everyone will probably know her best as the woman who illustrates those annoying bears in the Charmin commericals, which is a pity, because her animation skills are far beyond selling toilet paper. I hope she gets a chance to do something better soon! In the meantime, you can watch her student film, Girls Night Out, and several other films, on her website.
There is definitely a lot any artist, especially those who sketch figures or fashion figures, can learn from the animation process. I prefer personally to work often on tracing paper - I feel that the color translates better and you can see your progress beneath you. I might try this feeling of 'graduated' movement sketching in my next project.