This item on ‘autonomous’ sail boats was quite interesting. Click on the links to view the items.
http://www.sailinganarchy.com/fringe/2009/wasp.jpg
Turn on your sound for this one!
http://www.youtube.com/watch?v=Ug55ZbMLCus
http://www.youtube.com/watch?v=VcOHp08dxjk&feature=related
http://www.youtube.com/watch?v=flIfx_5ULXg&feature=related
http://www.youtube.com/watch?v=3ZFmjOHnWds&NR=1
John