2012 has long been known as either the year of apocalypse or human awakening. I believe it all started because the Mayan calendar ends on December 21, 2012.
There are all sorts of predictions and literature about it but in general it all seems to be rubbish.
http://en.wikipedia.org/wiki/2012#Me...al_predictions
The only prediction that has any real basis in science is a very, very, very small chance that the Earth's magnetic field will reverse (this is inevitable as the field weakens over time), but even that is considered to not have disastrous effects.
I'm interested to see what believers will say after we're all rushing to buy last-minute xmas gifts on the 22nd.