With so many possible ends of the world, it's not even worth it to get hyped up about it any more. There's global warming, the Yellowstone supervolcano, that Texas-sized comet (thankfully NASA has plan "Put Something Really Big Next to It" already in progress).
Firstly, 2012 is a stupid date for the world to end. If the world wanted to be cool in its ending, it would do it in 2000.
And the end of the world is very vague. Do you mean the end of Earth, the end of humanity, the end of life on Earth, or just general large amounts of death?
Oh, and by the way, I'm Christian. You better run before I use my mind control powers to convert you. Watch out.