The talk of 2012 covers many catastrophic scenarios.  An earth polar magnetic shift is a possibility,and is a part of the natural course.  This is not necessarily a flopping around of the earth, but a magnetic/electrical change, that will shift the polarity of the poles.  This would also include a directional change in the ULF.  This seems like a magnetic centrifuge.  Maybe it will spin off all the negative energy accumulated around the planet...can only hope.