to cool cpu's, researchers have developed a material which makes water flow up. see the video here:
http://www.engadget.com/2010/03/16/researchers-teach-liquid-to-flow-uphill-hope-to-cool-future-cpu/
Maybe a couple of strips of that material could make a wheel go round in water?
(I started this new topic because I did not want to hyjack this topic here: http://www.overunity.com/index.php?topic=9105.msg241412)
You can find an better way
in overunity.de
use google.com to translate
copy the link in the language tool.
http://www.overunity.de/index.php?topic=655.msg9698#msg9698
That is a totally different technology. Thanks nice link. Can't read german, but the pictures speak for themselves. Looks promising and powerfull. :)