Apparently some Iranian physicists have discovered a new motor made of a thin film of water bathed in two electric fields - more can be read here: http://softmatter.cscm.ir/FilmMotor/ (http://softmatter.cscm.ir/FilmMotor/)
Access is very slow right now. It's currently being slashdotted.
Here's a pdf from the website explaining the device.
It may be interesting to see what would happen if the Joule Thief were powering the electrolysis.