From NASA, a Youtube video (title "Why the World Didn't End Yesterday") on the Mayan "End of the World" scheduled for today:
No meteorite will strike us today. No monster tsunami will destroy the earth, people. No hurricane will wipe out the planet. There are fewer things in heaven and earth than may be dreamt of in philosophy. The world won't end today. Of that, I am quite sure. Trust me. We will be back tomorrow.
Update (Dec 22): Updated the post with the title of the video. And yes, we are alive. We made it. Whew!!