I'm guessing all of you know the Mayan significance of the year 2012. What do you think well happen?

About the same thing that happened the last time it rolled over. In other words, pretty much nothing. Whenever you hear someone breathlessly talking about some recurring event (be it Mayan calendars, planetary alignment, or whatever), it's always a good idea to ask what happened the last time the event occurred. If the answer was "nothing", then odds are that's what will happen the next time, too.

As for 2012 itself, that's a US presidential election year. Also, all 435 members of the House of Representatives and 1/3rd of the Senate will be up for reelection. In other words, it'll be a good time to avoid watching TV.

The Summer Olympics will be held in London.
It's a leap year.
I turn 55. My oldest grandkids will turn 7.