Earth Wobble?

http://news.yahoo.com/s/afp/20091123/ts_afp/australianzealandantarcticaclimateicebergin

In the above web article it mentions that 100s of icebergs are drifting towards New Zealand. They are the remains of a huge break of ice off of Antarctica.

My question is: Has anyone checked for an Earth wobble from this big of a break? It is known to be one of the potential causes of a magnetic pole shift if we get too big a wobble from too much ice breaking off at one time.

The fear is that the magnetic north would be shaken and become the magnetic south and vice versa. It is unknown what would happen to everything electrical on earth if this should happen. Theoretically, no crops could be grown for up to 5 years should this happen. However, in such times as the severe recession we are in worldwide if this happened likely no government would even speak about it to avoid world panic.

So, if there were a magnetic polar shift it is possible that no one would say anything.

However, even if this happened and nothing major happened it would only be like turning a bar magnet upside down, the part that attracted would now repulse and the part that repulsed would now attract.