I have something you might want to put up on your site. The man who inspired me to do mechanical pieces, Ben Thal, has posted a video on YouTube. I met him at a whirligig show in Oregon in 1994. He does great pieces with amazing and simple movements. He is a doctor and does whirligigs as a hobby. All his whirligigs are for indoors and are powered by a fan.
See it at: http://www.youtube.com/watch?v=Lnm_16KUF0M
The motions are pretty sophisticated for whirligigs...impressive!