Well, I don't know where else (recent) to post this (I could've sworn we had a brief discussion going about this somewhere a while ago, but nothing's turning up), but here's the basic lowdown on the whole deal for those uninformed:
http://en.wikipedia.org/wiki/B%27ak%27tunAfter reading this, I realized something: We're in the twelfth "Baktun"--of course they ended it there! Mayans, as I understand it, loved the number 12 (because it's equally divisible by 1, 2, 3, 4, and 6, I guess. Also, that's why a day is 24 hours: Twelve hours of day, twelve hours of night).