The @xxx is the current time in internet terms. the number 000 to 999 is a time unit called beats created for international internet time. 000 is midnight in Greenwich, the primary time zone.

A beat is approxiamately 1 minute 20 seconds long, and there are 1000 of them in a day. No matter where you are in the world, the time in beats is the same. Also it's fun to play with, but it slowed down the main page.

You can grab the @xxx tab and move it, seeing what beat time is in your local time.