To be honest, I thought that link you posted was utter garbage.
However there is a serious consequence of magnetic pole flipping. Presumably at some point during the process the Earth will "lose" it's magnetic field, or at least have it radically reduced for a time, which will clearly affect the ability of the magnetosphere to deflect the harmful gamma rays and shit away from the atmosphere, and the surface of the Earth.
This could have disastrous consequences for global communications, weather, etc, even life itself.
I've nothing against the theory in New Scientist that your link refers to (http://www.newscientist.com/article.ns?id=dn2152), however the person writing that HalfPastHuman nonsense seems to be a bit confused between magnetic poles and rotational poles.
Just because Hawaii and South Africa may become magnetic poles, doesn't mean they're going to get colder and penguins and polar bears will start living there ffs
It could not possibly get colder unless the earth changed its axis which has nothing whatsoever to do with the polarity, I think.
The best way to keep a secret:- Tell everyone not to tell anyone.
A study by the world's leading experts says global warming will happen faster and be more devastating than previously thought.
'The really chilling thing about the IPCC report is that it is the work of several thousand climate experts who have widely differing views about how greenhouse gases will have their effect. Some think they will have a major impact, others a lesser role. Each paragraph of this report was therefore argued over and scrutinised intensely. Only points that were considered indisputable survived this process. This is a very conservative document - that's what makes it so scary,' said one senior UK climate expert.
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