Worldometers

Worldometers uses your computer's clock to show real-time statistical estimates. Through this Java applet you can watch the numbers climb. Some of my favorites:

There have been nearly 794 million lightning strikes to the earth this year.
More than 9 million cars have been produced this year.
Nearly 27.5 million bicycles have been produced this year.
The absolute population growth (births - deaths) as of 10:30pm today is 187,400.