NORAD's Tracking Santa
How cool, did they do this last year? NORAD is tracking Santa as he journeys around the world (with strictly benevolent intent, I trust), and has a whole library of YouTube videos to show for it. (I spotted this on, ye gods, Fox News — on in the gym while I was sneaking in a Xmas eve workout.)
[Update:] So, yeah, I vaguely remember from childhood NORAD doing something like this even way back then (since 1955, to be exact), but the YouTube/Google Earth additions are what I was referring to.