Tomorrow is 12/21/12 as we date in the US. Tomorrow will not end us any more than the cycle we look at in blocks is really a circle from December 31st to January 1st. On the WAY outside, it might usher in an age of enlightenment, but there won't be anything massively destructive going on.
But many people will think that. Our popular culture has pushed this idea far enough that I fear for one thing: stupid human action.
Have a drink, celebrate the Maya cycle. But be safe, my friends.
(Sorry, the absence is just me sorting things out. The blog is not dead, just on a bit of delay.)