I've been practicing animating in Flash with abstract shapes. Some research on silhouette style animation helped me discover the clip above.
Michel Gagne talks about how fluid his hand drawn animation looks when he works at 30fps (games animation frame rate). I thought that may interest games animator's and traditional animators alike.
If you dig a little bit more you can also find the work Gagne did for Brad Bird and Pixar's Ratatouille.