Wow, I can just imagine myself hearing children asking their parents 'Are we there yet?' every few seconds but instead, I hear 'Is it the end of the world yet?' Kidding, kidding...
Oh well... as a Christian, I believe when it's time, it's time. No false prophets. No predictions. No warnings.
Logically thinking, if the Earth is really going to be hit by a giant ball of fire or asteroid or planets aligning or whatever the rumors being thrown around now, we would be able to see it in space long before it is 21st December 2012.
In any case, I'm just going to spend and cherish my time with my children and my family. Hug my kids a little more, a little tighter, smell them, kiss them all over, tickle them, just plain being silly with them and enjoy each and every moment. You never know when will be your last day on earth...