World Of Warcraft is off, for nao. Today is Tuesday and the servers are being repaired after a week of hard gaming. the servers need repairs every week because of the sheer number of player accounts logging in all the time. Blizzard are boasting 9 million active player accounts, and mine is one of them!
They are making enough money to get William Shatner, Mr. T, Vern Troyer, & Ozzy Ozborne in their TV commercials!

Just how much bandwidth does this take up? I dunno, someone call a web analyst and a mathematician.
However, I can tell you that during most of the week, a large percentage of the world's  web traffic are in the Blizzard servers. I'll wager that youtube and 4chan's traffic spike on Tuesdays.