Howdy Y'all...
This is the first time that I have seen a major industry publication publish an article about harvesting free energy. The circuits published are not sourcing a lot of power, but the idea that a magazine published this is significant...
http://electronicdesign.com/Articles/ArticleID/21485/21485.html
Figure 2a
Didn't Stefan have a similar idea a bit ago?
http://www.overunity.com/index.php?topic=2712.0