Well, the Mayan calendar does reset. Note that it does not end, as is commonly reported. Think of it like this: The Mayan Calendar is made of three concentric circles, the outer circle is the circle of seasons (basically months) the middle circle is the circle of Years, and the innermost circle is the circle of Ages.
In December 2012, the calendar resets to 1-Season 1-Year 1-Age, or 1/1/1. Every time the Circle of Seasons completes one full turn, the Circle of Years moves forward one notch. Every time the Circle of Years completes one full rotation, the Circle of Ages moves forward one notch, etc. I cannot remember how many notches each circle has, not off of the top of my head in any event. But, in any event, it takes a very long time for the calendar to reset.
Now, the 1/1/1 is associated with great trials and tribulation. It is seen as a time of pain necessary for rebirth into the new era of time. But by no means does that Calendar end. Circles do not end and that is a fact. The Mayans were tremendously gifted mathematicians, and understood this very well. The Calendar was started after the Mayan's great Tribulation, which lead to the creation of their culture. No one is sure if this event is fictional, or based on reality, but in essence, the Mayan culture that produced this calendar was born out of this 1/1/1 event.
So, yeah. I think the whole 2012 thing is overblown. Sure the world has some serious problems now, and we need to address them, even though it might lead to playing less Suikoden. But I don't think the world will "end" or we will have "Armegeddon" (Actualy a Valley in the Iraq/Syrian border area) nor an "Apocalypse" (Actually Koinea Greek for the verb: "To take the Lid Off.) These things tend to get seriously overblown. But hey, maybe it will spur some people to action to make positive changes in the world, so I am not complaining too badly lol.