2012. End of the World?

Mayans have supposedly predicted that the world will be no more on December 21, 2012. Okay, now here's where I get really defensive I can't help but think people are actually taking this seriously. Okay yeah it has me kinda scared but it's weird that thousands of people will believe a Mayans prediction but laugh when a psychic says a bus is going to crash. Now I'm not discouraging Mayan people I'm just voicing my opinion.  

My sisters friend parents who are REALLY religious said God was supposed to come to earth in like November 2007 or something like that and nothing happened. So I'm always open to people who say they can predict the future but is this really going to happen or is this just the rambling of so guy back in A.D? I don't think anyone will ever know until we get to the day 12-21-12.