This is from the Griffith Observatory web site:
The gently swaying Foucault Pendulum in the W.M. Keck Foundation Central Rotunda has long been a visitor favorite since the building opened in 1935. One of the largest such devices in the world, the fully restored pendulum is actually an elegant scientific instrument which demonstrates the Earth's rotation.
The 240-pound brass ball, suspended by a cable 40 feet long, swings in a constant direction while the Earth turns beneath it. The pendulum is mounted to a bearing in the rotunda ceiling that does not turn with the building as it rotates with the Earth. A ring magnet at the bearing gives a little tug on each swing of the pendulum to keep the pendulum in motion. As the day passes, the pendulum knocks over pegs set up in the pendulum pit and indicates the progress of rotation.
So yes, there is a magnet the keeps the pendulum swaying. The magnet, however, does not make the pendulum turn.
How do you know that only one man in australia says that a Foucault pendulum swings counterclockwise? Do you know everyone who has seen a Foucault pendulum. Do you know everyone who has reported anything on a Foucault pendulum? No, you don't. I don't, either. But I know that when I do a Google search for "Foucault pendulum southern hemisphere" all the web sites that are returned say that Foucault pendulums swing counterclockwise. These sites include both .com sites (from the northern hemisphere) and .au sites (from australia) like
http://www.phys.unsw.edu.au/~jw/pendulumdetails.html.
There are five Foucault pendulums in Australia, two in Argentina, one in Puerto Rico, and one in Antarctica. Considering the number of latitudes these are located at, and the availability of them (except for maybe the one at Antarctica), anyone can go visit them and know exactly how much they are going to turn if they did the right amount of math.
If one man from the southern hemisphere challenges all of those six billion people do you really think anyone would notice? Would his observations make a drop in the bucket? Do you think anyone in the Northern Hemisphere would CARE what this man saw?
I repeat, these Foucault pendulums are widely observable (except maybe the one in Antarctica). If the Foucault pendulum really didn't work, then more than one man would be talking about how it doesn't work, and eventually people would realize "Hey, this actually doesn't work."
For decades upon decades people have thought that the Corolis force between hemisphers was real. Snopes recently provided an alysis that debunked it.
Why have people blindly believed in the Corolis force for so long? Because it was simply what they were told and they were too lazy to do experimental study of their own.
Snopes never did any experiment that debunked the Coriolis effect on earth. Snopes did an experiment that debunked the Coriolis effect on water going down a sink

. Here's the link:
http://www.snopes.com/science/coriolis.asp.
I can't believe you, Tom. I just can't believe you. Snopes did an experiment proving that the Coriolis effect doesn't affect water going down toilets and sinks, but you say that Snopes debunked the actual Coriolis effect. You try to be scientific, but you change the facts to match your argument. That's utter cowardice in terms of debate. Utter cowardice. Grow some balls, and don't change what other peoples' experiments found. It's insulting.